不生病的小秘密-睡觉是灵丹妙药

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The Magic Bullet睡觉是灵丹妙药

 

An occasional restless night is nothing to worryabout, but a continuous lack of zzz's can hamper¹ your immune system's abilityto function.

 

 

Though experts often say that sleep requirements vary byindividual, a 2009 Carnegie Mellon study found that anything short of sevenhours nearly triples your odds² of catching³ a cold -- and that means sevenstraight hours, with no middle-of-the-night wake-ups.

 

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