Stop looking at your email each half hour. Decice on ONE time per day which will be your email reading and replying time.
不要隔半小时就看一次电子邮箱，每天规定一个时间来阅读和回复电子邮件。
Roughly half of the study subjects didn't work overtime. But 21 percent worked one extra hour, 15 percent worked two extra hours, and 10 percent worked three hours or more extra per day.
大约一半的研究对象是不加班的，但是有21%的人一天超时工作一小时，15%超时工作两小时，10%超时工作三小时或跟长时间。
"Light therapy" simply means sitting under a light box for about half an hour per day at home.
光疗“其实就是说每天在家里面坐在一个灯箱下半个小时。”
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