“阳光、活动、社交的缺少，组合构成了可能造成是冬季抑郁的元凶”新斯科舍省雅茅斯的心理学家MarkPottie说。

“It’s a combination of lack of sunlight, less activity, and lesssocializing that is probably most responsible, ” says Mark Pottier, apsychologist in Yarmouth, N.S.

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日，在四川省美姑县黄茅埂，一位妇女背着输液的儿子正赶回家。

A woman carrying her child with a fluid on their way home at Meigu County, southwest China's Sichuan Province, Jan. 4, 2010.

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日，在四川省美姑县黄茅埂，一位妇女背着输液的儿子正赶回家。

A woman carrying her child with a fluid on their way home at Meigu County, southwest China's Sichuan Province, Jan. 4, 2010.

youdao