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[originaltext] [13] Most Americans don’t eat enough fruits, vegetables or wh
[originaltext] [13] Most Americans don’t eat enough fruits, vegetables or wh
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2023-08-15
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问题
[13] Most Americans don’t eat enough fruits, vegetables or whole grains. Researcher now says adding fiber to the teen diet may help lower the risk of breast cancer.
Conversations about the benefits of fiber are probably more common in nursing homes than high schools. But along comes a new study that could change that. Kristi King, a diet specialist at Texas Children’s Hospital, finds it’s hard to get teenager patients’ attention about healthy eating, but telling them that eating lots of high-fiber foods could reduce the risk of breast cancer before middle age. That’s a powerful message.
[14] The new finding is based on a study of 44,000 women. They were surveyed about their diets during high school, and their eating habits were tracked for two decades. It turns out that those who consumed the highest levels of fiber during adolescence had a lower risk of developing breast cancer, compared to the women who ate the least fiber. This important study demonstrates that the more fiber you eat during your high school years, the lower your risk is in developing breast cancer in later life.
[15] The finding points to long-standing evidence that fiber may reduce circulating female hormone levels, which could explain the reduced risk. The bottom line here is the more fiber you eat, perhaps, a lower level of hormone in your body, and therefore, a lower lifetime risk of developing breast cancer. High-fiber diets are also linked to a reduced risk of heart disease and diabetes. That’s why women are told to eat 25 grams a fiber a day—men even more.
Questions 13 to 15 are based on the passage you have just heard.
13. What does the new study tell about adding fiber to the teen diet?
14. What do we learn about the survey of the 44,000 women?
15. What explanation does the speaker offer for the research finding?
选项
A、Fiber may help to reduce hormones in the body.
B、Fiber may bring more benefits to women than men.
C、Fiber may improve the function of heart muscles.
D、Fiber may make blood circulation more smooth.
答案
A
解析
浏览四个选项,根据选项中出现的help to reduce,bring more benefits,improve the function,make…more smooth等词以及四个选项均由fiber开头,可推测此题与纤维的积极作用有关。题干问的是讲话者是如何解释研究发现的。短文最后提到,研究发现指向了长期存在的证据,那就是纤维可以降低女性荷尔蒙分泌的水平,这可以解释高中时期多食纤维可以降低以后患乳腺癌的风险,故答案为A。B项(与男士相比,纤维给女士带来的好处更多),C项(纤维可改善心肌功能),D项(纤维促使血液循环更畅通)短文中均未提及,故排除。
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