To quote one medical opinion, "Thousands of people drift through life suffering from the effects of too little sleep; the reason is not that they can't sleep."
2
然而，这不是我睡不着的唯一原因。在去古巴前，我曾在伊拉克待了18个月。
But that is not the only reason I could not sleep; I had spent 18 months in Iraq just before my arrival in Cuba.
3
导致女人晚上睡不着的第二大普遍的原因（18%）是老想着还要干什么和工作压力。 。
Thee second most common reason for women lying awake at night, at 18 percent, was put down to 'to-do lists' and work stress.
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