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By featherstand511. The recuperation time the two groups compared with might be different.2. There might be great difference between the two groups of patients. Those who went to see sports medical doctor might have acute muscle strain while those to general physician might have chronic muscle strain. The two groups might not contain enough randomly selected patients.3. There might be other differences in the two doctors treatment besides using antibiotics, such as: muscle massage (按摩), specific drug and so on. The sports medical doctor might be more proficient and skillful in curing muscle strain.521. The several retired architects cannot represent the general situation of architects. They might just account for a small proportion. The scenario might have changed with the time.2. The several colleges reports are not persuasive. These colleges might be vocational institutions. And the students who leave school might have other reasons, such as: fascinated by other interest, unexpected family changes, or have disputes with other students or lovers. 3. It is very likely that many promising architects develop their interest during the study in college. 531. The number of the studied 25 is not enough to draw a conclusion.2. The melatonin might not affect the babys brain functions as it affects the mothers.3. Other factors contribute to the shyness of the teenagers: their family education, their living environment, or even their standard of shyness.541. It is very likely that these patients suffer from other dental problems caused by using Flux, such as tooth decay, irregular teeth.2. Other factors contribute to the healthy gums of the patients, healthy diets, good dental hygiene habits, regularly replacing toothbrush.3. Respondents cannot typify the general users of Flux. They might be those who develop the habits of floss often and who favor the mint flavor. Or they might even make that response in courtesy. There is no evidence that floss often contribute to the health of both teeth and gums.551. Other factors contribute to the increase of the traffic jams on Green Highway: adverse weather condition, unexpected traffic accidents, reduced traffic law enforcement.2. The opinion revealed by the recent questionnaire cannot represent that of all the commuters. They might be among those who love the sports of cycling or they just make that response in courtesy.3. The journey to work might be too long or inconvenient for people to take on by bicycle. Or they just take bicycle as a sport, not a means of transportation. Or it might cause some dangerous scenarios if the one bicycle lane becomes crowded.561. The discovered molds probably not belong to the Kalinese artists: some people other than the Kalinese take them to Kali for trade or for other purposes. Or the molds have other uses: to make other are works, food or for religious use.2. Other factors attribute to the entirely different style of miniature: different times, different aesthetic appreciation.3. The value of the sculptures depends on various factors: the age, the amount, the taste of people. (aesthetic value and historical value)571. Whether the number of studied patients is large enough and the time of observation is long enough to draw the conclusion.2. The doctor may also prescribe other wonder drugs, or give some special treatment, which might be the major factor of the cure of ulcer.3. No evidence manifest that Zorba is effective in prevent ulcer and has no side effect. And it is even possible that people will not adopt the doctors advice to take Zorba to prevent the disease.581. It is very likely that the inscription was not written by Scandinavians: by other people who had a knowledge of old Scandinavian in 1362. Or it was not taken to northern Wisconsin by the Scandinavians.2. The spot where the stone was unearthed was not the original site where the stone had been buried. It might have been dug up by someone and buried to a new place for some reasons.3. The club might not even exist when the stone was buried. It is very likely that those people came to the discovery site for the research of the stone.591. The coincidence cannot be the direct evidence. Other factors may be the major villains of the worst worldwide flu epidemics: wars, unidentified virus, and environmental changes.2. The heavy sunspot activity might produce some special substances or radiations, or activate some virus or bacteria that cause the flu, while during normal years these scenarios might not happen.3. The solar energy during normal years might be insignificant and avoiding exposure to the sun may have side effect.601. The author has confused cause with effect. It is very likely that the good health of the older person is the prerequisite for them to raise pets.2. The Several national studies cannot be simply to the specific regions as Glenntown. In this area, seniors who raise pets might have suffered from those diseases to a greater degree.3. The one rule might not fit all the citizens as there might be someone who have no affection with pets or even hate them, or they might be allergic to pets or develop other diseases, or they have no energy or time to feed the pets.611. The number of 1:7 is lower the average ratio of 1:5. It probably means that Eyleria might have not sufficient computers for all the students to use.2. The ratio of computers to students cannot equal to the rate of using computers. With not enough direction from teachers or through other means, it is very likely that the students might not be able to master the skills of computer technology. And this also account for a part of the budget.3. The author fails to mention the situation of other technology in Eyleria. It might be in a poor condition.4. Computers and other technology are updated rapidly. The maintenance expenditure should also take into account.621. The survey might be invalid as it conducted in such a short period after the release of the new coin and the number of respondents might be small to draw any conclusion.2. To own the Pine Tree dollar does not mean that people are using it more. It might be that the amount of circulation of the coin is large, and people have no choice but to accept it.3. The 62 percent of people who are still saving rather than spending the Pine Tree indicate clearly that this most recent coin might be less used in circulation but more in collection.4. It might not save money as the cost of minting coins might be higher than that of printing paper dollars. 631. The evidence that Stanley Park is no longer heavily used is unconvincing. The drop in the occupation of parking lots might result from the fact that more people take other means of transportation to Stanley Park. Or the situation of last month was just an aberration, or the number was just a bit lower than that of the first month as people usually prefer fresh and novel things.2. Carlton Park might usually not be that popular as that typical weekday. The number 150 is not convincing without comparison. Or there might be held a special campaign, or that day was a free day.3. Other differences might be the major factor of the drop in popularity: location, the view of the park, the tickets, the services and management.641. The percentage of enrollment is not convincing without comparison.2. Other factors contribute to the high percentage of enrollment: teaching method, climate of diligence, emphasis on academic performances. 3. The survey is problematic: the number of students, the range of school covered.4. “Perform better in critical thinking” cannot equal to “receive a better education in critical thinking”.651. The new stores situation cannot represent all. Last year might be an aberration and the trend might continue in the future (advertising campaign, health experts speaking).2. The subscribers might be those specific who prefer more of domestic cheese as there might be some advertisement on the magazines. Even the increasing preference might be insignificant compared to that of imported cheeses.3. The increase in the stock of domestic cheese might not save any inventory, and thus reduce expenses. The cost of domestic cheeses might even higher than that of imported ones.661. The prediction made by climate forecasters at Waymarsh University might not be accurate. They might just be amateurs rather than professional. Or perhaps they have neglected the possibility of unusual factors.2. The demand for heating oil might not increase or even decrease if a new energy (solar energy, tidy energy, wind energy, nuclear energy) has developed.3. Other competitors might perform much better than CI, which might capture bigger share of the market.671. The new department might fail to report some of its complaints (hoping to get more support, working errors)2. The drop in Polluxton might be an aberration and will not last long. And the number of readers in Polluxton might still larger than that in Castorville.3. The two distinct services cannot be compared. A united library might bring great inconvenience to people in Polluxton.4. Other measures might be more effective: enhance law enforcement.681. The increase in ticket prices might lead to a drop in the attendance, and thus inflict a decline on the profit of the Symphony.2. The increase in private contributions and profit might be insignificant compared to the large support of the government. 3. A budget deficit might still happen if other expenses increase, such as unexpected events (terrorist attack), new program under way, economic crisis.691. Other factors contribute to the decline in the number of yellow-legged frogs (water pollution, captured by people for some purposes)2. The experiment in only one lake is not convincing. The increase might not happen in other lakes if no frog exists in these lakes.3. The frog population might not be able to restore to its former levels. The several lakes might provide insufficient habitat for the frog to live. The tadpoles and young frogs are not able to move in several miles.701. The studies might be problematic: the number of accidents, the range of the spots where the accidents take place.2. The 70 percent of traffic accidents might not result from the incautious driving of the drivers. It might even not be the responsibility of the driver who is near home.3. The accidents might cause slight injuries while accidents occur in strange places might have much more severe consequences.711. New emergence of technology does not mean its immediate application and need further tests. Copper industries may persist to the traditional method of extracting copper (high cost of equipment, high demand of skillful workers, and high price of the patent).2. The arguer fails to mention the electricity use when the ore has low proportion of copper. The efficiency might be same in extracting ores of low quality. 3. The new technologies entitle factories to extract copper in a relatively low cost, and thus they might increase their scales of copper-extraction, which will eventually lead to an increase in the use of electricity.721. The author might confuse the cause with effect. The happy mood might be the reason of the active left prefrontal lobe of brains rather than the result.2. The treatment should undergo clinical trials before put into use. It might have some side effects and may cause other problems.3. Other methods might be more effective.731. The trend of leasing cars is unpredictable in future despite of the steady increase during the past years.2. Selling cars are more profitable than merely leasing them. The total number of people buying cars can remain considerable and the market of selling car is still profitable. Dropping it will cause the interest of the business to diminish.3. With the increase of leasing cars, the car-leasing company might also require a large number of cars, especially during the next few years, as the service life of the cars will come to an end.4. The competition of leasing cars industry might be very fierce. A haste shift may increase cost and may not be accepted by consumers, which may cause the profit to decrease.741. The proposed programs might not necessarily encourage the rate of dropout (no statistics). The diploma of high school might be much more valuable than the vocational training. The majority of students prefer academic programs.2. No evidence shows that the proposed programs would lower the average earning potential. Perhaps the number of dropouts is much larger and the participation of the programs entitles them opportunities to earn much more.3. The way of improving academic programs might not raise the average earning potential, as those dropouts might have no chance to get high salaries or even get lower than before. Other measures might be more effective: free academic programs available for dropouts.751. Children in cities might enjoy other sports activities. They might spend more time on sports during their leisure time than those in the rural areas.2. No statistics show that the obesity rates are lower in rural areas than in cities. 3. Decreased opportunities for exercise might not be the major villain of childrens obesity. Other factors devoted to the increasing obesity rates: unhealthy diet (fried snacks, over nourished food), irregular daily routines and other unhealthy lifestyles.761. The study was problematic: the number of volunteers, their facial skin condition. The study was held by Luxess itself, which makes the results open to doubt.2. The improvement should be observed by scientific measurement rather by subjective perception. It is possible that the improvement felt by the volunteers just came from their psychological hints and was not real.3. Other factors devoted to the improvement: the use of mild soaps, the habits of clean faces every morning, health diets and so on.771. No statistics show the proportion of the buildings built before 1985 destroyed in the earthquake. It is very likely that new buildings damaged more severely in the earthquake as the new stringent building codes might have some flaws.2. Other factors cause the bigger loss of East Sacunda: denser population, highly concentration of tall buildings, closer to the epicenter of the earthquake.3. No evidence shows that building owners of West Sacunda modify their buildings. Perhaps there are fewer buildings built before 1985 in West Sacunda than in East. 781. The cave where the bones were found was not its original site it was buried. 2. It is possible that the deer species and the gazelle species have evolved and changed their living habits during the thousands of years.3. No evidence shows that other animals living in the same times preferred the same habitats.4. The change from woodland to grassland might result from other factors: the cumulative effect of human activity.791. The drop in the accident rate might result from the increasing training standards or other factors.2. The result of the survey cannot be applied to the Longhaul trucking company (different areas, different routes, different standards, different pays)3. There is no direct relationship between the highest pay and the least accident occurrence, especially if the number of trucking company involved in the survey is small. It might just be a coincidence.801. The preliminary study should be researched further (advanced research). It does not reveal the direct correlation between clormium 5 and incidence of allergies and skin rashes. Other substances in the drinking water might be the major villain of the allergies and skin rashes.2. The presence of clormium 5 in several areas does not mean that all communities troubled with clormium 5 in the drinking water.3. The cost of replace drinking water by fountains might be much higher than that of purifying the water. Other measures might be more rational and effective: enact stringent release of industrial by-product to avoid clormium5 polluting drinking water.811. There might be other explanation of allergies which might be the factually accurate one.2. The study is problematic as it does not clarify the direct relationship between the exposure to irritants or bacteria and allergies. It is possible that those children are innate allergic sufferers or they have chance to touch with animals.3. The clean-sounding environment might not immune from some specific allergic sources.4. The way or exposure to irritants or bacteria may lead to other hazards, and there might be a much more effective and healthy. 821. The raw materials of charcoal is also wood, it might give slight help to solve the problem of deforestation. And using charcoal might cause other environmental and healthy problems. The process of making charcoal might produce a significant amount of carbon monoxide, which is deadly fatal.2. The switch might call for a large demand of charcoal, which might raise its price dramatically and cause people unable to afford.3. Other sources of energy might be a better solution to the problem.831. The purchases of medicine might not be totally independent of the economy. When the nations economy is weak, people might prefer to the relatively low cost of medicine and avoid buying drugs for precaution or for nutrient supplementary.2. The steady profit of the drugstore industry does not equal to that of a specific drugstore. The profit of Medicine Inc. depends on other factors such as competitors, suppliers, internal management, and advertisement campaigns and so on.3. No evidence shows that their profits will increase rather than stagnate. And whether to open an additional drugstore should depend on a detai
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