为什么晒太阳有益健康?
<p><span word="Hurray">Hurray</span> <span word="for">for</span> <span word="warm">warm</span> <span word="days">days</span> <span word="and">and</span> <span word="long">long</span>, <span word="summer">summer</span> <span word="evenings">evenings</span>! <span word="The">The</span> <span word="sun">sun</span> <span word="is">is</span> <span word="good">good</span> <span word="for">for</span> <span word="us">us</span> - <span word="in">in</span> <span word="fact">fact</span>, <span word="researchers">researchers</span> <span word="at">at</span> <span word="Sweden">Sweden</span>'<span word="s">s</span> <span word="Karolinska">Karolinska</span> <span word="Institute">Institute</span> <span word="say">say</span> <span word="that">that</span> <span word="avoiding">avoiding</span> <span word="the">the</span> <span word="sun">sun</span> <span word="can">can</span> <span word="be">be</span> <span word="as">as</span> <span word="bad">bad</span> <span word="for">for</span> <span word="you">you</span> <span word="as">as</span> <span word="smoking">smoking</span>. <span word="Here">Here</span>'<span word="s">s</span> <span word="why">why</span> <span word="it">it</span>'<span word="s">s</span> <span word="good">good</span> <span word="to">to</span> <span word="spend">spend</span> <span word="time">time</span> <span word="in">in</span> <span word="the">the</span> <span word="sunshine">sunshine</span>...</p><p>致阳光明媚的日子！致漫长的夏夜！太阳有益身体健康--事实上，瑞典卡罗林斯卡研究所的研究员表示，避免与阳光接触可能会带来与吸烟一样的影响。那为什么晒太阳有益身体健康呢？</p>
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