越来越多的研究发现，睡觉，包括午休，可以让人更聪明。

Here's more evidence that sleep, including napping, can make you smarter.

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这里的“及时”，包括下课后及时复习，三分钟的时间闭上眼睛回顾本课重点和难点，中午午休要再次复习，至多五分钟。

Here the "timely", including the timely review after class, three minutes of time to close your eyes to review the key points and difficulties, noon lunch break to review again, up to five minutes.

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