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Sleep difficulties are a common problem for millions of adults. Even if you can get to sleep, you might have trouble staying asleep. Does this sound familiar? You drift off to dreamland, but find yourself wide awake at 3 a.m., or maybe you wake up every few hours throughout the night. Adequate sleep is supposed to leave you feeling refreshed and ready to start your day. But if your sleep is interrupted, you’re likely to feel fatigued and sleepy the next day. So what gives? There are several factors that may interfere with getting your zzz’s including the following: 数百万成年人受到睡眠问题的困扰。即使你能够睡着，往往也可能睡不沉。听起来很耳熟？你睡着了，结果凌晨三点又醒了，或者你每隔几个小时就会醒一次。充足的睡眠理应让你软然一新，并使你为新的一天做好准备。但如果你的睡眠质量不高，第二天你就会感到疲劳和昏昏欲睡。这到底是什么造成的呢？下面列出了几点会影响你正常睡眠的原因： | 
