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  3. Better Control of TB Seen If a Faster Cure Is Found The World Health Organization estimates that about one-third of all peop

Better Control of TB Seen If a Faster Cure Is Found The World Health Organization estimates that about one-third of all peop

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问题                 Better Control of TB Seen If a Faster Cure Is Found
    The World Health Organization estimates that about one-third of all people are infected with bacteria that cause tuberculosis(结核病). Most times, the infection remains inactive(不活跃的). But each year about eight million people develop active cases of TB, usually in their lungs. Two million people die of it. The disease has increased with the spread of AIDS and drug - resistant forms of tuberculosis.
    Current treatments take at least six months. Patients have to take a combination of several antibiotic(抗生素)drugs daily. But many people stop as soon as they feel belter. Doing that can lead to an infection(传染病)that resists treatment. Public health experts agree that a faster-acting cure for tuberculosis would be more effective. Now a study estimates just how effective it might be. A professor of international health at Harvard University led the study. Joshua Salomon says a shorter treatment program would likely mean not just more patients cured. It would also mean fewer infectious patients who can pass on their infection to others.
    The researchers developed a mathematical(数学的)model to examine the effects of a two -month treatment plan. They tested the model with current TB conditions in Southeast Asia. The scientists found that a two-month treatment could prevent about twenty percent of new cases. And it might prevent about twenty-five percent of TB deaths. The model shows that these reductions would take place between two thousand twelve and two thousand thirty. That is, if a faster cure is developed and in wide use by two thousand twelve.
    The World Health Organization developed the DOTS program in nineteen ninety. DOTS(短 期直接观察治疗)is Directly Observed Treatment, Short-course. Health workers watch tuberculosis patients take their daily pills to make sure they continue treatment.
    Earlier this year, an international partnership of organizations announced a plan to expand the DOTS program. The ten-year plan also aims to finance research into new TB drugs. The four most common drugs used now are more than forty years old. The Global Alliance for TB Drug Development(全球结核病药物开发联盟)says its long-term goal is a treatment that could work in as few as ten doses.
Now there are______most common drugs being used for more than forty years.
选项 A、one
B、two
C、three
D、four
答案D
解析 由最后一段“The four most common drugs used now are more than forty years old”可知，现在最常用的四种治疗结核病的药已有四十多年的历史了。所以要加大投资金额用于研发新药品。
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