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1、到乌蒙山区的昭通;从甘肃中部的定西，到内蒙古边陲的阿尔山，看真贫、知真贫，真扶贫、扶真贫，成为“花的精力最多”的事;“扶贫先扶志”“扶贫必扶智”“实施精准扶贫”Unit5ThepowerofnatureⅠ.阅读理解Thenewfindingsholdthatlessdemandingactivities,suchaslisteningtoclassicalmusic,probablywon’tbringnoticeablebenefitstoanagingmind.“Itseemsitisnotenoughjusttogetoutanddosomething
2、—itisimportanttogetoutanddosomethingthatisunfamiliarandmentallychallenging,andthatprovidesbroadstimulation（刺激）mentallyandsocially,”saidleadresearcherDeniseParkoftheUniversityofTexasatDallas.Thenewfindingsprovidemuch-neededinsightintothefactorsofeverydayactivitiesthatcontributetocog
3、nitivevitality（认知活力）asweage.“Weneed,asasociety,tolearnhowtomaintainahealthymind,justlikeweknowhowtomaintainphysicalhealthwithdietandexercise,”saidPark,“Weknowsolittlerightnow.”“Thisisanassumption,butwhatifchallengingmentalactivityslowstherateatwhichthebrainages?Everyyearthatyousave
4、couldbeanaddedyearofhigh-qualitylifeandindependence.”Fortheirstudy,Parkandcolleaguesrandomlyassigned221adults,aged60to90,toengageinaparticulartypeofactivityfor15hoursaweekoverthecourseofthreemonths.Someparticipantswereassignedtolearnanewskill—digitalphotography,quilting,orboth—whic
5、hrequiredactiveengagementandtappedworkingmemory,long-termmemoryandotherhigh-levelcognitiveprocesses.Otherparticipantswereinstructedtoengageinmorefamiliaractivitiesathome,suchaslisteningtoclassicalmusicandcompletingwordpuzzles.And,toaccountforthepossibleinfluenceofsocialcontact,some
6、participantswereassignedtoasocialgroupthatincludedsocialinteractions,fieldtrips,andentertainment.Attheendofthreemonths,Parkandcolleaguesfoundthattheadultswhowereproductivelyengagedinlearningnewskillsshowedimprovementsinmemorycomparedtothosewhoengagedinsocialactivitiesornon-demandin
7、gmentalactivitiesathome.Thethreelearninggroupswerepushedveryhardtokeeplearningmoreandmasteringmoretasksandskills.Onlythegroupsthatwerefacedwithcontinuousmentalchallengeimproved.“Ourparticipantsessentiallyagreedtobeassignedrandomlytodifferentlifestylesforthreemonthssothatwecouldcomp
8、arehowdifferentsocialandle
