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职称英语卫生类B阅读理解练习.docx

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职称英语卫生类B阅读理解练习 2017职称英语卫生类B阅读理解练习 2017年职称英语不久后就要开考了，为了帮助大家备考，小编整理了一些卫生了B级阅读理解练习，欢迎阅读! FindYourselfPackingIton?BlameFriends Obesitycallspreadfrompersontoperson,muchlikeavirus,researchersarereportingtoday.Whenonepersongainsweight,closefriendstendtogainweight,too. Theirstudy,publishedinTheNewEnglandJournalofMedicine,involvedadetailedanalysisofalargesocialnetworkof12,067peoplewhowerebeencloselyfollowedfor32years,from1971to2003. Theinvestigatorsknewwhowerefriendswithwhomaswellaswhowasaspouseorsiblingorneighbor,andtheyknewhowmucheachpersonweighedatvarioustimesoverthreedecades.Thatletthemreconstructwhathappenedovertheyearsasinpidualsbecameobese.Didtheirfriendsalsobecomeobese?Didfamilymembers?Orneighbors? Theanswer,theresearchersreport,wasthatpeopleweremostlikelytobecomeobesewhenafriendbecameobese.Thatincreasedaperson'schancesofbecomingobeseby57percent.Therewasnoeffectwhenaneighborgainedorlostweight,however,andfamilymembershadlessinfluencethanfriends. Itdidnotevenmatterifthefriendwashundredsofmilesaway,theinfluenceremained.Andthegreatestinfluenceofallwasbetweenclosemutualfriends.There,ifonebecameobese.theotherhada171percentincreasedchanceofbecomingobese.too. Thesameeffectseemedtooccurforweightloss,theinvestigatorssay.Butsincemostpeopleweregaining,notlosing,overthe32years,meresultwas,onaverage,thatpeoplegrewfatter. Dr.NicholasA.Christakis,aphysicianandprofessorofmedicalsociologyatHarvardMedicalSchoolandaprincipalinvestigatorinthenewstudy,saidoneexplanationwasthatfriendsaffectedeachothers’perceptionoffatness.Whenaclosefriendbecomesobese,obesitymaynotlooksobad. "Youchangeyourideaofwhatisanacceptablebodytypebylookingatthepeoplearoundyou."Dr.Christakissaid. TheinvestigatorssaytheirfindingscanhelpexplainwhyAmericanshavebecomefatterinrecentyears—eachpersonwhobecameobesewaslikelytodragalongsomefriends. Theiranalysiswasunique,Dr.Christakissaid,becauseitmovedbeyondasimpleanalysisofonepersonandhisorhersocialcontactsandinsteadexaminedallentiresocialnetworkalo