【单选题】{{B}}第三篇{{/B}}
A、high-profile attempt to eradicate theAIDS virus in a few patients continues to show promise.
But researchers won’t know for a year or more whether it will work, scientistDavid Ho told journalists this Wednesday for the FourthConference in Viruses and Infections.
"This is a study that’s in progress," says Ho, head of theAaronDiamondAIDS ResearchCenter, New York.
The study involves 20 people who started combinations of anti-HIV drugs very early in the course of the disease, within 90 days of their infections. They’ve been treated for up to 18 months. Four others have dropped out because of side effects or problems complying with the exacting drug system.
The drugs have knocked theAIDS virus down to undetectable levels in the blood of all remaining patients.And, in the latest development, scientists have now tested lymph nodes and semen from a few patients and found no virus reproducing there, Ho says. "Bear in mind that undetectable does not equal absent," Ho says.
Ho has calculated that the drugs should be able to wipe out remaining viruses--at least from known reservoirs throughout the body--in two to three years.But the only way to prove eradication would be to stop the drugs and see if the virus comes back. On Wednesday, Ho said he wouldn’t ask any patient to consider that step before 2 years of treatment.
And he emphasized that he is not urging widespread adoption of such early, aggressive treatment outside of trials. No one knows the long-term risks.
But other scientists are looking at similar experiments.A、federally funded study will put 300 patients on triple-drug treatments and then see if some responding well after six months can continue to suppress the virus on just one or two drugs, says researcherDouglas Richman of the University ofCalifornia, SanDiego. Some patients in that study ’also may be offered the chance to stop therapy after 18 months or more, he says.
By waiting for the virus to die slowly.
C．By asking the patients’ feeling about the disease.
D．By stopping the drags to see if the virus comes back.
网考网参考答案：D
网考网解析：
[解析] 该题可直接借助常识判断答案D合理。也可以借助原文：利用题干中的核心短语“wiped out”作为答案线索，发现答案相关句：He has calculated that the drugs should be able to wipe out remaining viruses—at least from known reservoirs(储主)throughout the body—two to three years，But the only way to prove eradication(与wiped out是近义词)would be to stop the drugs and see if the virus comes back．该句说“证明是否彻底消灭了病毒的惟一方法就是观察停药后病毒是否会卷土重来。”因此D是答案。 wipe out v．消灭，垮台 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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