B
Over the past 20 years, the number of children who are overweight has increased by more than 50%. 25% to 30% of school-age children in the United States are overweight or obese (肥胖的), which puts them at a high risk for heart disease and other health problems.
According to the experts, poor eating habits and inactivity are the root causes of childhood obesity. In addition, the high level of fat calories in the average United States diet combined with the inactive lifestyle of many children is contributing to (促成) the rapid increase in childhood obesity.
If a child is more than 40% overweight, a scientific weight loss program may be suggested to change the child’s eating behaviors. During the course of the program, the emphasis should be on developing a healthier lifestyle for the long term, not just on losing weight now. Children are developing physically and mentally, and they need adequate nutrition (足够的营养) as they grow. Combining a healthy diet with exercise is the best way to achieve healthy level of body fat.
Dr. Gidding, a professor at Yale University, explains that many children or teens tend to become overweight because of too many calories and too little exercise. “If your child or teen tends to sit around and watch television or play video games, try gently introducing more physical activities into your family life, ” suggests Dr. Gidding. “Take a walk together or go for a bike ride. Make good nutrition and exercise a family affair by planning lower fat meals, nutritious snacks and family activities. ”
【文章大意】这是一篇说明文。文章主要讲述了美国儿童肥胖问题已经成为一个很严重的问题, 并提出了解决的建议。
24. In the first paragraph, the writer emphasizes that ______.
A. overweight causes many health problems
B. childhood obesity is a serious problem in the USA
C. about 25% of children will be obese in the USA
D. more than 50% of children are overweight in the USA
【解析】选B。推理判断题。根据第一段Over the past 20 years, the number of children who are overweight has increased by more than 50%. 25% to 30% of school-age children in the United States are overweight or obese, which puts them at a high risk for heart disease and other health problems. (在过去的20年里, 超重儿童的数量增加了50%以上。在美国, 25%到30%的学龄儿童超重或肥胖, 这使他们处于心脏病和其他健康问题的高风险中。)可知, 作者以列数字的论证方式强调了儿童肥胖在美国是一个严重的问题。故选B。
25. How many causes of obesity in kids are mentioned in the passage?
A. 1. B. 2. C. 3. D. 4.
【解析】选C。细节理解题。根据第二段According to the experts, poor eating habits and inactivity are the root causes of childhood obesity. In addition, the high level of fat calories in the average United States diet combined with the inactive lifestyle of many children is contributing to the rapid increase in childhood obesity. (专家认为, 不良的饮食习惯和缺乏运动是儿童肥胖的根本原因。此外, 美国人的日常饮食中脂肪热量过高, 加上许多儿童不运动的生活方式, 导致了儿童肥胖症的迅速增加。)可知, 造成儿童肥胖的原因有: 不良的饮食习惯、不运动、美国饮食中的高脂肪热量三种。故选C。
26. A weight loss program is focused on ______.
A. nutrition meals B. regular exercise
C. an easy lifestyle D. a healthy lifestyle
【解析】选D。细节理解题。根据第三段中During the course of the program, the emphasis should be on developing a healthier lifestyle for the long term, not just on losing weight now. (在这个项目的过程中, 重点应该是长期发展一种更健康的生活方式, 而不仅仅是现在减肥。)可知减肥计划的重点是健康的生活方式。故选D。
27. When a child is on weight loss program, his parents should pay much attention to ______.
A. the nutrition he needs
B. the change in his weight
C. the effect of the program
D. the sports he takes part in
【解析】选A。推理判断题。根据倒数第二段中Children are developing physically and mentally, and they need adequate nutrition as they grow. (儿童的身心都在发育, 他们在成长过程中需要足够的营养。)可知, 当一个孩子参加减肥计划时, 他的父母应该多注意孩子的饮食健康, 即营养问题。故选A。
