Stephenusedtoworkinacompany.Unluckily,hegotseriousheart...
问题详情：Stephenusedtoworkinacompany.Unluckily,hegotseriousheartdisease.Hecouldn'tworkforalongtime.Thinkinghecouldstilldosomethingforothers,hedecidedtobeavolunteer(志愿者)ataChildren'sHospital.Stephe...