想得太多,死得越快?
<p><span word="One">One</span> <span word="key">key</span> <span word="to">to</span> <span word="a">a</span> <span word="longer">longer</span> <span word="life">life</span> <span word="could">could</span> <span word="be">be</span> <span word="a">a</span> <span word="quieter">quieter</span> <span word="brain">brain</span> <span word="without">without</span> <span word="too">too</span> <span word="much">much</span> <span word="neural">neural</span> <span word="activity">activity</span>, <span word="according">according</span> <span word="to">to</span> <span word="a">a</span> <span word="new">new</span> <span word="study">study</span> <span word="that">that</span> <span word="examined">examined</span> <span word="postmortem">postmortem</span> <span word="brain">brain</span> <span word="tissue">tissue</span> <span word="from">from</span> <span word="extremely">extremely</span> <span word="long">long</span>-<span word="lived">lived</span> <span word="people">people</span> <span word="for">for</span> <span word="clues">clues</span> <span word="about">about</span> <span word="what">what</span> <span word="made">made</span> <span word="them">them</span> <span word="different">different</span> <span word="from">from</span> <span word="people">people</span> <span word="who">who</span> <span word="died">died</span> <span word="in">in</span> <span word="their">their</span> 60<span word="s">s</span> <span word="and">and</span> 70<span word="s">s</span>.</p><p>一项新研究表明，长寿的一个关键因素可能是大脑比较平静，且没有太多的神经活动。该研究剖检了寿命极长之人死后的脑组织，以寻找他们与六七十岁即去世之人的不同之处。</p><p>"<span word="Use">Use</span> <span word="it">it</span> <span word="or">or</span> <span word="lose">lose</span> <span word="it">it</span>" <span word="has">has</span> <span word="dominated">dominated</span> <span word="thinking">thinking</span> <span word="on">on</span> <span word="how">how</span> <span word="to">to</span> <span word="protect">protect</span> <span word="the">the</span> <span word="aging">aging</span> <span word="brain">brain</span>, <span word="and">and</span> <span word="extensive">extensive</span> <span word="research">research</span> <span word="shows">shows</span> <span word="there">there</span> <span word="are">are</span> <span word="many">many</span> <span word="benefits">benefits</span> <span word="to">to</span> <span word="remaining">remaining</span> <span word="physically">physically</span> <span word="and">and</span> <span word="mentally">mentally</span> <span word="active">active</span> <span word="as">as</span> <span word="people">people</span> <span word="get">get</span> <span word="older">older</span>.</p><p>关于如何保护衰老的大脑，“用进废退”一直主宰着人们的想法。大量研究表明，随着年龄的增长，保持身体和精神上的活跃有很多好处。</p><p><span word="But">But</span> <span word="the">the</span> <span word="study">study</span>, <span word="published">published</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Nature">Nature</span>, <span word="suggests">suggests</span> <span word="more">more</span> <span word="isn">isn</span>'<span word="t">t</span> <span word="always">always</span> <span word="better">better</span>. <span word="Excessive">Excessive</span> <span word="activity">activity</span> - <span word="at">at</span> <span word="least">least</span> <span word="at">at</span> <span word="the">the</span> <span word="level">level</span> <span word="of">of</span> <span word="brain">brain</span> <span word="cells">cells</span> - <span word="could">could</span> <span word="be">be</span> <span word="harmful">harmful</span>.</p><p>但发表在《自然》杂志上的这项研究表明，并不总是越多越好。至少过度的脑细胞活动可能是有害的。</p>
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