- 问题详情:Aslifeexpectancyincreasesnowadays,theaveragepersonliveswellbeyondtheageofretirement.Asaresult,theelderlymakeupanever-increasingpercentageofsociety,whichmakesitmoreimportantthaneverforarealefforttobemadeinimprovingthelivesofseniorcitizens.Onew...
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