Doctors say obesity，also known as severe overweight，is a complex condition.A doctor may advise medical interventions(医疗干预) in addition to changes in behavior.But experts say the more successful weightloss plans include a wellbalanced diet and exercise.
People who want to avoid weight gain have to balance the number of calories they eat with the number of calories they use.To lose weight，you can reduce the number of calories you take in，or increase the number you use，or both.Experts at the National Institutes of Health say to lose weight，a person should do some moderate or intensive physical exercise most days of the week.This could include fast walking，sports or strength training.
A recent study looked at four of the most popular dieting plans in the United States.Researchers at Stanford University studied more than three hundred overweight women，mostly in their thirties or forties.Each woman went on one of the four plans：Atkins，The Zone，Ornish or LEARN.The women attended diet classes and received written information about the food plans.At the end of a year，the women on the Atkins diet had lost the most，more than four and a half kilograms on average.
Christopher Gardner led the study，reported in the Journal of the American Medical Association. He said the Atkins diet may be more successful because of its simple message to lower the intake of sugar.Also，he said the advice to increase protein in the diet leads to more satisfying meals.
But last week，another report suggested that only a small minority of people have longterm success in dieting.Researchers at the University of California found that most dieters regained their lost weight within five years.And often they gained back even more.But those who kept the weight off generally were the ones who exercised.
小题1:All the following is helpful to lose weight EXCEPT________.
A．a healthy diet
B．physical exercise
C．medical interventions
D．being polite to others小题2:You are most likely to gain too much weight if________.
A．you eat the same number of calories as the number you use
B．you take in less calories than the number you use
C．you take in more calories than the number you use
D．you take exercise regularly on the weekdays小题3:The third paragraph mainly tells us that________.
A．there are four popular dieting plans in the USA
B．the Atkins diet has the best effect on losing weight
C．lots of women attended diet classes every day
D．dieting plan is the most important小题4:Which one of the following is NOT right according to this passage?
A．The change of your life habits can help you lose weight.
B．You’d better exercise once a week to lose some weight.
C．The Atkins diet may be good because of lowering the intake of sugar.
D．Some people gain weight back for their unhealthy diet.小题5:Which one of the following is the best title for this passage?
A．Successful Weightloss Plans
B．Four Popular Dieting Plans
C．What Is the Atkins Diet?
D．Few People Fail in Losing Weight
小题1:D
小题2:C
小题3:B
小题4:B
小题5:A
题目分析： 本文是一篇议论文。一些专家通过观察、分析认为比较成功的减肥方案包括均衡饮食和坚持锻炼只有这样才会有较好的效果。
小题1:细节题：从文章第一段的句子：A doctor may advise medical interventions(医疗干预) in addition to changes in behavior.But experts say the more successful weightloss plans include a wellbalanced diet and exercise.可知均衡饮食，锻炼和医疗干预都有助于减肥。但是没有提到对别人礼貌可以减肥的。可知D正确。
小题2:细节题：从文章第二段的句子：People who want to avoid weight gain have to balance the number of calories they eat with the number of calories they use.可知如果你需要的卡路里比你需要使用的多，就会发胖。选C
小题3:段落大意题：从第三段的句子：At the end of a year，the women on the Atkins diet had lost the most，more than four and a half kilograms on average.可知这段讲的主要是Atkins 饮食对减肥有最好的疗效，选B
小题4:细节题：从第二段的句子：Experts at the National Institutes of Health say to lose weight，a person should do some moderate or intensive physical exercise most days of the week.This could include fast walking，sports or strength training.可知专家建议减肥的人一个星期大部分日子要锻炼，不是B项说的一周一次，所以选B。
小题5:标题确定题：文章介绍肥胖是一个严重的问题，很多人想要减肥，文章提供了一些成功的减肥方法，选A。