2013年职称英语综合类a级阅读判断精选(2)
<p> <span word="Stem">Stem</span> <span word="Cell">Cell</span> <span word="Therapy">Therapy</span> <span word="May">May</span> <span word="Help">Help</span> <span word="Repair">Repair</span> <span word="the">the</span> <span word="Heart">Heart</span></p><p> <span word="According">According</span> <span word="to">to</span> <span word="scientists">scientists</span> <span word="in">in</span> <span word="the">the</span> <span word="USA">USA</span>, <span word="stem">stem</span> <span word="cell">cell</span> <span word="therapy">therapy</span> <span word="may">may</span> <span word="one">one</span> <span word="day">day</span> <span word="be">be</span> <span word="able">able</span> <span word="to">to</span> <span word="repair">repair</span> <span word="the">the</span> <span word="hearts">hearts</span> <span word="of">of</span> <span word="people">people</span> <span word="with">with</span> <span word="heart">heart</span> <span word="failure">failure</span>. <span word="Researchers">Researchers</span> <span word="at">at</span> <span word="Pittsburgh">Pittsburgh</span> <span word="University">University</span> <span word="School">School</span> <span word="of">of</span> <span word="Medicine">Medicine</span> <span word="examined">examined</span> 20 <span word="patients">patients</span> <span word="who">who</span> <span word="had">had</span> <span word="severe">severe</span> <span word="heart">heart</span> <span word="failure">failure</span> <span word="and">and</span> <span word="were">were</span> <span word="going">going</span> <span word="to">to</span> <span word="have">have</span> <span word="surgery">surgery</span>.</p><p> <span word="They">They</span> <span word="injected">injected</span> <span word="stem">stem</span> <span word="cells">cells</span> <span word="into">into</span> <span word="the">the</span> <span word="parts">parts</span> <span word="of">of</span> <span word="their">their</span> <span word="hearts">hearts</span> <span word="that">that</span> <span word="were">were</span> <span word="damaged">damaged</span>, <span word="They">They</span> <span word="then">then</span> <span word="compared">compared</span> <span word="their">their</span> <span word="hearts">hearts</span> <span word="with">with</span> <span word="those">those</span> <span word="of">of</span> <span word="people">people</span> <span word="who">who</span> <span word="had">had</span> <span word="undergone">undergone</span> <span word="surgery">surgery</span> <span word="without">without</span> <span word="having">having</span> <span word="the">the</span> <span word="stem">stem</span> <span word="cells">cells</span> <span word="injected">injected</span> <span word="into">into</span> <span word="them">them</span>（<span word="they">they</span> <span word="had">had</span> <span word="also">also</span> <span word="suffered">suffered</span> <span word="from">from</span> <span word="severe">severe</span> <span word="heart">heart</span> <span word="failure">failure</span>）. <span word="The">The</span> <span word="patients">patients</span> <span word="who">who</span> <span word="had">had</span> <span word="had">had</span> <span word="the">the</span> <span word="stem">stem</span> <span word="cells">cells</span> <span word="injected">injected</span> <span word="had">had</span> <span word="hearts">hearts</span> <span word="that">that</span> <span word="were">were</span> <span word="able">able</span> <span word="to">to</span> <span word="pump">pump</span>（用泵抽运）<span word="more">more</span> <span word="blood">blood</span> <span word="than">than</span> <span word="the">the</span> <span word="others">others</span>.</p><p> <span word="According">According</span> <span word="to">to</span> <span word="Professor">Professor</span> <span word="Robert">Robert</span> <span word="Kormos">Kormos</span>, <span word="one">one</span> <span word="of">of</span> <span word="t">t</span>11<span word="e">e</span> <span word="researchers">researchers</span>, <span word="these">these</span> <span word="results">results</span> <span word="could">could</span> <span word="revolutionize">revolutionize</span> <span word="heart">heart</span> <span word="treatment">treatment</span>. <span word="Although">Although</span> <span word="previous">previous</span> <span word="studies">studies</span> <span word="had">had</span> <span word="indicated">indicated</span> <span word="that">that</span> <span word="there">there</span> <span word="might">might</span> <span word="be">be</span> <span word="a">a</span> <span word="benefit">benefit</span>, <span word="this">this</span> <span word="is">is</span> <span word="the">the</span> <span word="first">first</span> <span word="study">study</span> <span word="that">that</span> <span word="has">has</span> <span word="actually">actually</span> <span word="proved">proved</span> <span word="that">that</span> <span word="stem">stem</span> <span word="cell">cell</span> <span word="therapy">therapy</span> <span word="can">can</span> <span word="help">help</span> <span word="the">the</span> <span word="failing">failing</span> <span word="heart">heart</span> <span word="work">work</span> <span word="better">better</span>.</p><p> <span word="All">All</span> <span word="the">the</span> <span word="patients">patients</span> <span word="in">in</span> <span word="this">this</span> <span word="study">study</span> <span word="had">had</span> <span word="hearts">hearts</span> <span word="that">that</span> <span word="could">could</span> <span word="not">not</span> <span word="pump">pump</span> <span word="blood">blood</span> <span word="properly">properly</span>. <span word="The">The</span> <span word="scientists">scientists</span> <span word="measured">measured</span> <span word="their">their</span> <span word="ejection">ejection</span> <span word="fraction">fraction</span>（射血分数）. 1<span word="t">t</span> <span word="is">is</span> <span word="a">a</span> <span word="measure">measure</span> <span word="of">of</span> <span word="heart">heart</span> <span word="performance">performance</span>；<span word="you">you</span> <span word="measure">measure</span> <span word="how">how</span> <span word="much">much</span> <span word="blood">blood</span> <span word="is">is</span> <span word="being">being</span> <span word="pumped">pumped</span> <span word="out">out</span> <span word="by">by</span> <span word="the">the</span> <span word="left">left</span> <span word="ventricle">ventricle</span>（心室）.</p><p> <span word="Healthy">Healthy</span> <span word="peoples">peoples</span> <span word="ejection">ejection</span> <span word="fraction">fraction</span> <span word="is">is</span> <span word="about">about</span> 55％. <span word="These">These</span> <span word="patients">patients</span> <span word="had">had</span> <span word="ejection">ejection</span> <span word="fraction">fraction</span> <span word="of">of</span> <span word="under">under</span> 35％. <span word="They">They</span> <span word="a">a</span>11 <span word="had">had</span> <span word="by">by</span>-<span word="pass">pass</span> <span word="surgery">surgery</span>（搭桥手术）<span word="performed">performed</span> <span word="on">on</span> <span word="them">them</span>. <span word="Some">Some</span> <span word="of">of</span> <span word="the">the</span> <span word="patients">patients</span> <span word="had">had</span> <span word="stem">stem</span> <span word="cells">cells</span> <span word="taken">taken</span> <span word="from">from</span> <span word="their">their</span> <span word="hip">hip</span> <span word="bones">bones</span> <span word="and">and</span> <span word="injected">injected</span> <span word="into">into</span> 25-30 <span word="sites">sites</span> <span word="in">in</span> <span word="the">the</span> <span word="damaged">damaged</span> <span word="heart">heart</span> <span word="muscle">muscle</span>, <span word="Six">Six</span> <span word="months">months</span> <span word="later">later</span> <span word="their">their</span> <span word="ejection">ejection</span> <span word="fraction">fraction</span> <span word="rate">rate</span> <span word="was">was</span> 46. 1％<span word="while">while</span> <span word="those">those</span> <span word="who">who</span> <span word="just">just</span> <span word="had">had</span> <span word="surgery">surgery</span> <span word="but">but</span> <span word="no">no</span> <span word="stem">stem</span> <span word="cell">cell</span> <span word="injections">injections</span> <span word="averaged">averaged</span> 37 2％.<span word="No">No</span> <span word="side">side</span> <span word="effects">effects</span> <span word="were">were</span> <span word="reposed">reposed</span>.</p>
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