While increasing potassium intake is probably a good idea for most elderly women, there are some people who have too much potassium in their blood, which can be dangerous to the heart. “People should check with their doctor about how much potassium they should eat, ”she said.

　　The study was observational and included only elderly women. Researchers also did not take sodium(钠)intake into consideration, so the potential importance of a balance between sodium and potassium is not among the findings. Researchers said more studies are needed to determine whether potassium has the same effects on men and younger women.

　　【文章大意】本文讲的是钾的摄入对老年妇女来说是好的, 可以减少患许多疾病的风险。

　　5. Which of the following figures meets the daily potassium intake recommendation of the World Health Organization?

　　A. 4, 000 mg.

　　B. 3, 500 mg.

　　C. 3, 000 mg.

　　D. 2, 500 mg.

　　【解析】选A。推理判断题。根据文章倒数第三段第三句话The World Health Organization’s daily potassium recommendation for women is lower, at 3, 510 mg or more. 可知。

　　6. What conclusion can be drawn from the research findings?

　　A. Increasing potassium is definitely a good idea for all elderly women.

　　B. Elderly women with high blood pressure benefit more from potassium.

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