ort and strength. spare no effort to learn how to find true friendships and how to be a good friend.
友谊有利于人们的健康。在艰难中，她们是人们舒展身心，增添力量的源泉。要不遗余力地学会如何寻找真正的友谊，也要学会怎样寻找自己的知己。
你真正了解友谊和健康的关系吗？
while there is an impressive body of research linking friendship and health status, the precise reasons for this connection are still far from clear. most of the studies are large prospective studies (that follow people over a period of time) and while there may be a correlation between the two variables (friendship and health status), researchers still don't know if there is a cau资源难易程度:★★★★★★★★★★★★★★★
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