Better than before 0621

1.People wasted 8.4 minutes in online puttering-checking email,Internet surfing,and the like.

…and the like,等等，感觉比and so on高大人点，更书面。

2.Research shows that the chronically sleep-deprived are quite impaired.

3.Do you depend on caffeine and sugar to give you energy spikes?

-a spike in interest rate利率的大幅上调

spike 尖状物；激增

4.关于睡眠，作者给的建议

Using a clear rule,instead of "feeling sleepy".