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  3. A team of researchers has found that immunizing patients with bee venom instead of with the bees’ crushed bodies can better prev

A team of researchers has found that immunizing patients with bee venom instead of with the bees’ crushed bodies can better prev

admin2010-10-14  76
问题     A team of researchers has found that immunizing patients with bee venom instead of with the bees’ crushed bodies can better prevent serious and sometimes fatal sting reactions in the more than one million Americans who are hypersensitive to bee stings. The crushed-body treatment has been standard for fifty years, but a report released recently said that it was ineffective. The serum made from the crushed bodies of bees produced more adverse reactions than the injections of the venom did.
    The research compared results of the crushed-body treatment with results of immunotherapy that used insect venom and also with results of a placebo. After six to ten weeks of immunization, allergic reactions to stings occurred in seven of twelve patients treated with the placebo, seven of twelve treated with crushed body extract, and one of eighteen treated with the venom.
Results of the experiment indicated that ______.
选项 A、patients treated with venom were stung less frequently
B、immunotherapy was effective for all patients
C、immunization took place in 7 out of 12 patients
D、the traditional treatment was as effective as the placebo
答案D
解析 重要句题。最后一句实验结果说明传统治疗方法与安慰疗法等效。A项经过毒液治疗的人更少被蜜蜂蜇，文中未提。B项在最后实验结果表明并不是所有人的效果相同。C项中的结果没有说用哪种治疗方法，不能判断。
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