John-Snow-Defeats-King-Cholera阅读公开课PPT课件

Unit1GreatscientistswarmingupThesecondsuggestedabsorbedthisdiseaseintotheirbodieswiththeirmeals.,AnotheroutbreakhitLondon.,Morethan500peoplehaddiedin10days.,18,-,ThesenumbersinBroadStreetnearthewaterpumphadmanyofthedeaths,20and21BroadStreetand8and9CambridgeStreethadnodeaths.TheydidntdrinkthewaterfromtheBroadStreetpump.,Thesefamiliesworkedinthepubat7CambridgeStreet.,19,-,16,37,20,8,9,pump,38,40,BROADSTREET,CAMBRIDGESTREET,21,JohnSnowsCholeraMap,7,Pub,20,-,Whatistheproblem?,Thecholerawasthemostdeadlydiseaseofitsday.Neitheritscause,noritscurewasunderstood.,Whatcausedcholera?,21,-,Makeaquestion:Whichtheorytobelievein?,Idea1,Idea2,Choleramultipliedintheairwithoutreason.Acloudofdangerousgaswouldfloatarounduntilitfounditsvictims.,Peopleabsorbeditwiththeirmeals.,Whichonedoyoubelievemore?WhataboutJohnSnow?,22,-,AmapofBroadStreet,Whatmethoddidheuse?,BroadStreet,Manydeathshappenedhere.,Nodeathhappenedhere.,Itseemedthewaterfromthepumpwastoblame.Whatdidhedonext?,Publichouse,23,-,(Para6)Whatwasanothersupportingevidence?,(Para5)Helookedintothesourceofthewater,JohnSnowwasabletoannouncewithcertaintythatpollutedwatercarriedthegerms.,24,-,Readthepassageandnumbertheseeventsintheorderthattheyhappened.,JohnSnowbegantotesttwotheories.,AnoutbreakofcholerahitLondonin1854.,Heannouncedthatthewatercarriedthedisease.,JohnSnowmarkedthedeathsonamap.,2,1,4,7,Carefulreading:,25,-,KingCholerawasdefeated.,Hefoundthatmostofthedeathswerenearawaterpump.,Hehadthehandleremovedfromthewaterpump.,JohnSnowinvestigatedtwostreetswheretheoutbreakwasverysevere.,3,8,5,6,26,-,1.JohnSnowbelievedIdea2wasright.Howdidhefinallyproveit?,KEY:JohnSnowfinallyprovedhisideabecausehefoundanoutbreakthatwasclearlyrelatedtocholera,collectedinformationandwasabletotiecasesoutsidetheareatothepollutedwater.,Readandanswerthequestions.,27,-,2.DoyouthinkJohnSnowwouldhavesolvedthisproblemwithoutthemap?Giveareason.,KEY:No.ThemaphelpedJohnSnoworganizehisideas.Hewasabletoidentifythosehouseholdsthathadmanydeathsandchecktheirwater-drinkinghabits.Heidentifiedthosehousesthathadnodeathsandsurveyedtheirdrinkinghabits.Theevidenceclearlypointedtothepollutedwaterbeingthecause.,28,-,3.Cholerawasa19thcenturydisease.Whatdiseasedoyouthinkissimilartocholeratoday?,KEY:Fourdiseases,whicharesimilartoday,areSARS,AIDS,TB(肺结核)andbird-flu,becausetheyareveryserious,haveanunknowncauseandneedpublichealthcaretosolvethem.,29,-,Whatshouldwepayattentiontoinourdailylifeinordernottogetinfectedwithcholera?,Heatthefoodleftovernight,Cookrawfoodthoroughly,Washhandsoften,Keepawayfromflies,choosefreshseafood,Keepthek