阅读理解We'reallheardaboutthepowerofpositive(积极的)thinkingbutarecentstudyfoundthatpeoplewhothinkthey'regettingfitactuallygetmorepositivebenefitsfromactivityaccordi

　　阅读理解

　　We'reallheardaboutthepowerofpositive(积极的)thinkingbutarecentstudyfoundthatpeoplewhothinkthey'regettingfitactuallygetmorepositivebenefitsfromactivityaccordingtoaReutersHealtharticle

　　Thestudyexaminedhotelhousekeepersoveraperiodoffourweeks．SomeofthehousekeepersweretoldthattheirworkdutiesgavethemenoughactivitytomeettheSurgeonGeneral'shealthguidelines(准则)．Anothergroupofhousekeepersweretoldnoting．Afterfourweeksthehousekeeperwhobelievedtheirworkactivitycountedasexerciselostweightandbodyfatandtheirbloodpressurewentdown．

　　Theresultsofthisstudysuggestthatit'simportanttounderstandandbelieveinthepositivebenefitsofyouractivity．Sohereareafewthingstothinkaboutthenexttimeyouexercise

　　Justthirtyminutesofquickwalkingeachdaycangreatlyreduceyourriskofaheartattack．

　　Evenyourhousework-likeyardworkandhousecleaning–canhelpyouburncaloriesandincreaseyourfitnesslevels

　　Weightbearingactivityjustafewtimesaweekcanbuildbonedensity(密度)andreduceyourchancesofdevelopingosteoporosis(骨质疏松)

　　Three10-minuteworkouts(锻炼)throughoutthedayarejustasgoodtoyourhealthasonelongworkout

　　Moderate(适度的)amountsofexercisehavebeenlinkedtolowerratesofheartdiseasestrokeandevencancer

　　Strengthtrainingcanhelpmakedailyactivistlikecarryingbagsorlaundryfeeleasier

　　Regularexercisewillreducestresskeepyouinagoodmoodandimprovethequalityofyoursleep．

　　(1)

　　Themainpurposeofthispassageisto________

　　[]A．

　　encouragepeopletothinktheywillgetfitindifferentactivates

　　B．

　　tellpeoplehowtofinishtheworkdutiesbetter

　　C．

　　tellpeoplehowtoloseweight

　　D．

　　advisepeopletodomorehousewo