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 people.

　　61. The benefits of potassium intake to elderly women do not include ______.

　　A. preventing strokes

　　B. reducing heart attacks

　　C. cutting down death risks

　　D. lowering blood pressure

　　62. Which of the following figure 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

　　63. 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.

　　C. Potassium intake is more beneficial to those without high blood pressure.

　　D. There was not any association between potassium intake and ischemic strokes.

　　64. The author’s purpose for writing this passage is to ______.

　　A. present a report on a new research

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