"Gratitude is more than just feeling good," says Nathan DeWall, who led the study at Kentucky.

“感恩不仅仅是感觉不错，”内森·德沃尔这么说道，他是肯塔基负责这项研究的人。

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The research: The University of Kentucky’s C. Nathan DeWall asked 62 undergraduates to take 1, 000 milligrams of acetaminophen or a placebo for three weeks.

研究：肯塔基州大学的C·楠檀·德沃请了62个在校大学生进行了为期三周的实验，他们或者服用了1000毫克的退热净，或者作为对照组服用无效对照剂。

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In a 2007 study, University of Kentucky psychologists Nathan DeWall and Roy Baumesiter divided several dozen students into two groups.

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