题目内容：
根据以下材料回答题 Peopletodayexpecttobeexaminedwhentheyenteradoctor'soffice．Atleasttheyexpecttheirbloodpressureandtemperaturetobemeasured．However,asrecentlyastwohundredyearsago,adoctor'streatmentdependedontalkingwithpatients．Ingeneral,thecommunicationbe-tweendoctorsandtheirpatientswasthemostimportantpartofmedicalmethods．Themodemageofmedicinebeganwiththestethoscope,aninstrumentforlisteningtopatients'heartbeatandbreathing．Beforethat,adoctordidnottouchapatient．Infact,therewasnosuchthingasame-dicalexamination．
Thestethoscope--withallothermedicalinstruments--hasaseriouseffectonthepracticeofmedicine．Doctorsbecomebetteratfindingthemedicalproblems．Morelivesaresaved．Atthesametime,doctorsgivelessimportancetothecommunicationbetweenpatientsanddoctors．Somedoctorsactuallystoptalkingtotheirpatients．Itiseasytounderstandwhysomesickpeoplethoughtthemselvesasbrokenmachines．
Astethoscopecanbeusedto__________． A．checkhealthconditions
B．curesomeillnesses
C．measuretemperatures
D．treatheartdisease
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