If you watched a certain swimmer’s Rio Games debut on Sunday night, when he propelled the United States 4×100-meter relay team t

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问题     If you watched a certain swimmer’s Rio Games debut on Sunday night, when he propelled the United States 4×100-meter relay team to a gold medal, you know the answer: Michael Phelps. While it may look like the athletes have been in a bar fight, the purple dots actually are signs of "cupping," an ancient Chinese healing practice that is experiencing an Olympic moment.
    In cupping, practitioners of the healing technique—or sometimes the athletes themselves— place specialized cups on the skin. Then they use either heat or an air pump to create suction between the cup and the skin, pulling the skin slightly up and away from the underlying muscles. The suction typically lasts for only a few minutes, but it’s enough time to cause the capillaries just beneath the surface to rupture, creating the circular, eye-catching bruises that have been so visible on Phelps as well as members of the United States men’s gymnastics team.
    Physiologically, cupping is thought to draw blood to the affected area, reducing soreness and speeding healing of overworked muscles. Athletes who use it swear by it, saying it keeps them injury free and speeds recovery. Phelps posted an Instagram photo showing himself stretched on a table as his Olympic swimming teammate Allison Schmitt placed several cups along the back of his thighs. "Thanks for my cupping today!" he wrote.
    While there’s no question that many athletes, coaches and trainers believe in the treatment, there’s not much science to determine whether cupping offers a real physiological benefit or whether the athletes simply are enjoying a placebo effect. "A placebo effect is present in all treatments, and I am sure that it is substantial in the case of cupping as well," said Leonid Kalichman, a senior lecturer at Ben-Gurion University of the Negev in Israel. "A patient can feel the treatment and has marks after it, and this can contribute to a placebo effect."
    One 2012 study of 61 people with chronic neck pain compared cupping to a technique called progressive muscle relaxation, or PMR, during which a patient deliberately tenses his muscles and then focuses on relaxing them. About half the patients used cupping while the other half used PMR. Both patient groups reported similar reductions in pain after 12 weeks of treatment. Notably, the patients who had used cupping scored higher on measurements of well-being and felt less pain when pressure was applied to the area. Even so, the researchers noted that more study is needed to determine the potential benefits of cupping.
In cupping, practitioners of the healing technique use the following EXCEPT______.

选项 A、heat
B、a cup
C、a circle
D、an air pump

答案C

解析 根据题干关键词定位到文章第二段。根据第二段第一句“治疗师——有时是运动员自己——把特制的杯子放在皮肤上”可知,拔罐时需要B项。根据第二句的they use either heat or an air pump可知.A项和D项也需要。根据排除法,排除C项“一个圆环”,故C项为正确答案。
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