健康生活:书包太重,孩子身体遭殃
<p><span word="My">My</span> 11-<span word="year">year</span>-<span word="old">old</span> <span word="grandsons">grandsons</span>, <span word="Stefan">Stefan</span> <span word="and">and</span> <span word="Tomas">Tomas</span>, <span word="weigh">weigh</span> <span word="about">about</span> 80 <span word="pounds">pounds</span> <span word="each">each</span>. <span word="On">On</span> <span word="the">the</span> 20-<span word="minute">minute</span> <span word="walk">walk</span> <span word="to">to</span> <span word="their">their</span> <span word="middle">middle</span> <span word="school">school</span> <span word="and">and</span> <span word="the">the</span> <span word="uphill">uphill</span> <span word="walk">walk</span> <span word="home">home</span>, <span word="they">they</span> <span word="carry">carry</span> <span word="backpacks">backpacks</span> <span word="that">that</span> <span word="weigh">weigh</span> <span word="about">about</span> 12 <span word="pounds">pounds</span> <span word="each">each</span>, <span word="or">or</span> 15 <span word="percent">percent</span> <span word="of">of</span> <span word="their">their</span> <span word="body">body</span> <span word="weight">weight</span>.</p><p>我的两个孙子斯蒂芬(<span word="Stefan">Stefan</span>)和托马斯(<span word="Tomas">Tomas</span>)现年11岁，体重都是80来磅（合36公斤）。他们每天要步行去初中上学，回家时还得走一段上坡路，在这段20分钟的路程里，他俩要各自背着12磅（合5.4公斤）的书包，也就是说，书包的重量达到他们体重的15%。</p><p><span word="When">When</span> <span word="extra">extra</span> <span word="books">books</span> <span word="or">or</span> <span word="clothing">clothing</span>, <span word="a">a</span> <span word="musical">musical</span> <span word="instrument">instrument</span> <span word="or">or</span> <span word="other">other</span> <span word="equipment">equipment</span> <span word="are">are</span> <span word="added">added</span>, <span word="the">the</span> <span word="weight">weight</span> <span word="they">they</span> <span word="carry">carry</span> <span word="can">can</span> <span word="reach">reach</span> 20 <span word="pounds">pounds</span>. <span word="But">But</span> <span word="whatever">whatever</span> <span word="the">the</span> <span word="figure">figure</span>, <span word="those">those</span> <span word="packs">packs</span> <span word="are">are</span> <span word="simply">simply</span> <span word="too">too</span> <span word="heavy">heavy</span> <span word="for">for</span> <span word="their">their</span> <span word="still">still</span>-<span word="forming">forming</span> <span word="bones">bones</span> <span word="and">and</span> <span word="muscles">muscles</span>.</p><p>如果加上额外的书本、衣服、一件乐器或别的用品，他们要背的书包很可能达到20磅重（合9公斤）。但不管究竟有多重，他们的书包对于仍在发育中的骨骼和肌肉来说，未免过于沉重了。</p><p><span word="Heavy">Heavy</span> <span word="backpacks">backpacks</span> <span word="don">don</span>'<span word="t">t</span> <span word="just">just</span> <span word="sap">sap</span> <span word="children">children</span> <span word="of">of</span> <span word="energy">energy</span> <span word="that">that</span> <span word="might">might</span> <span word="be">be</span> <span word="better">better</span> <span word="used">used</span> <span word="doing">doing</span> <span word="schoolwork">schoolwork</span> <span word="or">or</span> <span word="playing">playing</span> <span word="sports">sports</span>. <span word="Lugging">Lugging</span> <span word="them">them</span> <span word="can">can</span> <span word="also">also</span> <span word="lead">lead</span> <span word="to">to</span> <span word="chronic">chronic</span> <span word="back">back</span> <span word="pain">pain</span>, <span word="accidents">accidents</span> <span word="and">and</span> <span word="possibly">possibly</span> <span word="lifelong">lifelong</span> <span word="orthopedic">orthopedic</span> <span word="damage">damage</span>.</p><p>沉重的书包不仅会消耗孩子们本可以用来更好地做功课或参加体育活动的精力。负担过重，可会导致慢性背痛、发生意外，甚至有可能带来终生的骨骼伤害。</p>
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