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    <p style="margin-right: 14px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">研究人員將</span><span style="font-family:Calibri">600</span><span style="font-family:宋體">多名老年癡呆癥患者分成兩個(gè)組:第一組補(bǔ)充一定劑量的維生素</span><span style="font-family:Calibri">E</span><span style="font-family:宋體">,第二組服用安慰劑。在兩年多的時(shí)間里,研究者發(fā)現(xiàn),就患者從事制訂計(jì)劃、做飯和購(gòu)物等日常活動(dòng)的能力而言,第一組患者要比第二組患者下降慢。在實(shí)驗(yàn)中,研究人員給第一組補(bǔ)充的維生素</span><span style="font-family:Calibri">E</span><span style="font-family:宋體">的劑量是每天</span><span style="font-family:Calibri">2000</span><span style="font-family:宋體">國(guó)際單位,而以前一般只維持在</span><span style="font-family:Calibri">400</span><span style="font-family:宋體">國(guó)際單位左右。研究人員由此斷定,每天服用</span><span style="font-family:Calibri">2000</span><span style="font-family:宋體">國(guó)際單位的維生素</span><span style="font-family:Calibri">E</span><span style="font-family:宋體">會(huì)有效緩解老年癡呆癥的惡化。</span></span></p><p style="margin-right: 14px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">以下哪項(xiàng)如果為真,最能質(zhì)疑研究人員的結(jié)論</span><span style="font-family:Calibri">?</span></span></p><p style="margin-right: 14px"><br/></p><p><br/></p>
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