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牛津大学的一个研究团队在《自然》杂志上发表了一项突破性的研究，首次从细胞能量的角度，解释了人类为什么需要睡觉的根本原因。他们发现，当大脑细胞里的线粒体因为能量太多而“过载”时，就会出现电子泄漏，进而产生一些有害的活性氧分子。这个过程会触发大脑进入睡眠状态，以防止细胞受到伤害。
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