英语暑假作业（阅读完型）高二五班郝寄蓉No.102BJOneofthegreatestkillersintheWesternworldinheartdisease.Thedeathrate（率）fromthediseasehasbeenincreasingatanalarmingspeedforthepastthirtyyears.TodayinBritain,forexample,aboutfourhundredpeopleadaydieofheartdisease.Mdicalexpertsknowthatpeoplecanreducetheirchancesofgettingheartdiseasebyexercisingregularly,bynotsmoking,bychangingtheirdiets,andbypayingmoreattentiontoreducingstress（压力）intheirwork.However,Westernhealth-caresystemsarestillnotpayingenoughattentiontothepreventionofthedisease.Thereisaneedformoreprogramstoeducatethepublicaboutthecausesandpreventionofheartdisease.Insteadofsupportingsuchprograms,however,theU.S.health-caresystemisspendinglargesumsofmoneyonthesurgical（外科的）treatmentofthediseaseafteritdevelops.Thisemphasis（强调）ontreatmentclearlyhassomethingtodowiththetechnologicaladvancesthathavetakenplaceinthepasttentofifteenyears.Inthistime,moderntechnologyhasenableddoctorstodevelopnewsurgicaltechniques.Manyoperationsthatwereconsideredimpossibleortoorisky（有风险的）afewyearsagoarenowperformedeverydayinU.S.hospitals.Theresulthadbeenahugeincreaseinheartsurgery.Althoughthereisnodoubtthatheartsurgerycanhelpalargenumberofpeople,somepeoplepointoutthattheemphasisonthesurgicaltreatmentofthediseasehasthreecleardisadvantages.First,itattractsinterestandmoneyawayfromthequestionofprevention.Second,itcausesthecostsofgeneralhospitalcaretorise.Afterhospitalsbuytheexpensiveequipmentthatisnecessaryformodernheartsurgery,theymusttrytorecoverthemoneytheyhavespent.Todothis,theyraisecostsforalltheirpatients,notjustthosepatientswhosetreatmentrequirestheequipment.Thethirddisadvantageisthatdoctorsareencouragedtoperformsurgery—evenonpatientsforwhomanoperationisunnecessary—becausetheequipmentandexpertskillsarethere.Agovernmentofficerecentlystatedthatmajorheartsurgerywasoftenperformedeventhoughitschancesofsuccesswerelow.Inonetypeofheartsurgery,forexample,only15percentofpatientsimprovedtheirconditionsafterthesurgery.However,morethan100,000oftheseoperationsareperformedinthe