__________(48)A.The amount of change was small he
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__________(48)
A.The amount of change was small,he said.
B.Another expert agreed that the ancient Indian practice of yoga might ease hypertension.
C.In the study,researchers tracked 58 women and men,aged 38 to 62,for six months.
D.Yoga is proved to be effective in lowering high blood pressure.
E.The study did have some limitations.
F. This may be because doing both required a greater amount of time,making it more difficult for participants to stick with their regimens.
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答案：A
本题考查的是对所读材料的大意和主旨的掌握。后一句说：但是，一些大型人群研究显示这一量级的变化会产生重大的长远效果。A选择最合适，并与后一句的“但是”“重大的长远效果”相呼应。