AccordingtoGermanresearchers,forcingpeopletobehappyandp...
问题详情：AccordingtoGermanresearchers,forcingpeopletobehappyandpoliteallthetimeislikelytomakethemsick.Theybelievemostatriskareairhostesses,callcenteroperators,waitersandotherworkersinclosecontactwithth...