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  3. We have heard a lot about the health benefits of tea, especially green tea. It is high in polyphenols, compounds with strong ant

We have heard a lot about the health benefits of tea, especially green tea. It is high in polyphenols, compounds with strong ant

admin2018-08-14  67
问题     We have heard a lot about the health benefits of tea, especially green tea. It is high in polyphenols, compounds with strong antioxidant activity that in test-tube and animal models show anticancer and heart-protective effects. Good clinical studies are few, however, and although physicians tell their patients to drink green tea, there hasn’t been any definite proof of the value of that advice.
    A team of Japanese researchers was able to link green tea consumption with decreased mortality from many causes-including heart disease. The researchers tracked 40,530 healthy adults ages 40 to 79 in a region of northeastern Japan where most people drink green tea, following them for up to 11 years. Those who drank five or more cups of green tea a day had significantly lower mortality rates than those who drank less than one cup a day. There were also fewer deaths from cardiovascular disease.
    But no such association was seen with deaths from cancer. Nor was consumption of oolong or black tea connected with any decrease in mortality. Those teas are easier to be combined with oxygen in processing, which not only darkens the color of the leaves and changes their flavor but also reduces their polyphenol content.
    Coffee is more complicated. It has received both gold stars and black marks in medical literature. It, too, contains antioxidants, although they are less well studied than tea polyphenols. Evidence for the health benefits of coffee is growing, however. A group of investigators from Finland, Italy and the Netherlands reports that coffee seems to protect against age-related decline in mental capacity. The scientists studied 676 healthy men born from 1900 to 1920 and followed them for 10 years, using standardized measures of brain function. Their conclusion: the men who consumed coffee had significantly less decline in mental capacity than those who didn’t. Three cups a day seemed to provide the most protection.
    Population studies like those help us form assumptions about relationships between dietary habits and long-term health. We still have to test our suppositions in controlled conditions, and measure the effects of coffee and tea on various systems of the body.
The Japanese study seems to have confirmed the positive effect of green tea on( ).
选项 A、young adults
B、Asian people
C、patients with cancer
D、patients with heart disease
答案D
解析 事实细节题。题干大意：日本人的研究似乎确认了绿茶对( )的良好功效。文章第二段介绍日本研究团队针对绿茶功效的研究过程。在对本项研究的描述中，作者特别提出了心脏病患者，并在最后一句指出，长期饮用绿茶的人中心血管病死亡人数较少。在第三段第一句中，作者明确指出，是否饮用绿茶与因癌症死亡没有关联。四个选项中，只有D(心脏病人)为正确答案，另外三项A(年轻人)，B(亚洲人)，C(癌症病人)均不合题意。
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