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  3. 1 Millions of teens are on weight-reducing diets. Although maintaining a healthy body weight is important, obsessive dieting can

1 Millions of teens are on weight-reducing diets. Although maintaining a healthy body weight is important, obsessive dieting can

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问题 1 Millions of teens are on weight-reducing diets. Although maintaining a healthy body weight is important, obsessive dieting can lead to eating disorders. Eating disorders can disrupt lives and sometimes even result in death.
Starving Oneself
2 Anorexia nervosa is an eating disorder in which people starve themselves. Anorexics have an irrational fear of becoming fat and see themselves as much heavier than they really are. They shun food and may exercise for hours every day in an attempt to lose weight.
3 Female anorexics may never mature sexually or may stop menstruating because they lose too much body fat, causing the level of sex hormones to fall. Their body temperature and pulse rate become abnormally low; their hair becomes thin and dry; and their resistance to infection drops.
Bingeing and Purging
4 Patients with bulimia engage in frequent episodes of bingeing (eating a large amount of food in a short time). After a binge, they almost always purge by self-induced vomiting or by using laxatives. Therefore, their weight stays fairly constant. Unlike anorexic patients, bulimics often recognize that their behavior is abnormal and often feel guilty, depressed, and helpless.
5 The frequent purging removes salts from the body, which can eventually lead to muscle weakness, heart failure, and kidney disease. The vomiting gradually destroys tooth enamel and results in unhealthy gums.
Help for People with Eating Disorders
6 Little is known about what causes anorexia nervosa and bulimia. Many people believe that western society’s emphasis on thinness in women is largely to blame. However, recent research suggests that genetic factors might also be involved. Both eating disorders can be managed with a combination of medical treatment, counseling, and family support.  
The word "purge" has the closest meaning to ______.
选项 A、binge
B、vomit
C、laxation
D、both B and C
答案D
解析 词汇推理题。第4段的：“they almost always purge by self-induced vomiting or by using laxatives.”和第5段的“The frequent purging removes salts from the body... The vomiting gradually...”两句形成语义连接，使purge，vomit和laxative这三个词相互关照和解释：腹泻，呕吐和泻药，所以PURGE的意思是：又吐又泻。
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