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  3. Many Americans have been feeding a baby aspirin once a day, believing it would protect them from a heart attack, a stroke, and e

Many Americans have been feeding a baby aspirin once a day, believing it would protect them from a heart attack, a stroke, and e

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问题     Many Americans have been feeding a baby aspirin once a day, believing it would protect them from a heart attack, a stroke, and even cancer. But several recent studies have 【C1】________this into question.
    One large-scale study【C2】________more than 19,000 healthy people ages 65 and older. Participants were【C3】________assigned to take either 100 mg of aspirin (slightly more than the 81 mg dose that【C4】________people take) or a placebo (a harmless substance given to a sick person【C5】________medicine, without telling them it is not real) every day for an average of 4.7 years.【C6】________did people in the aspirin group not【C7】________their risk of heart disease, dementia, or disability, but they were also more【C8】________to suffer from significant bleeding in the digestive tract or brain. And they were more likely to die【C9】________apparently because of an increased risk of【C10】________cancer.
    【C11】________, a trial of more than 12,500 people ages 55 and older【C12】________to have a moderate cardiovascular risk found no benefit to taking aspirin daily. In a study of more than 15,000 people with diabetes, a daily aspirin did【C13】________heart attacks and strokes, but it also【C14】________ major bleeding. And according to an analysis of data from more than 117,000 people,【C15】________ people needed larger doses of aspirin to help【C16】________their risk of heart attack, stroke, and cancer.
    The bottom line: Although there is good【C17】________that aspirin can help people who have already had or are at【C18】________risk for heart attacks or strokes, the drug’s【C19】________is not so clear for people, especially older people, with less risk.【C20】________your doctor before starting—or stopping—aspirin.
【C5】
选项 A、as well as
B、in spite of
C、along with
D、instead of
答案D
解析 本题空格处需要填入一个介词短语，需满足句意“安慰剂(一种________药物的对病人无害的物质，但不告诉他们这并非药物)”。此处的not，real指的是not real medicine，所以空格处所填短语应意为“而非；不是”，四个选项中只有D项instead of意为“代替，而不是”，符合句意，故为答案。A项a8 well a8意为“以及”；B项in spite of意为“不顾，尽管”；C项along with意为“除了……之外；与……一起”，三个选项代入原文均不符合句意。故排除。
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