5、We all have to eat, but choosing the right foods can be hard. Many people also have trouble controlling how much they eat.

 Instead of eating a reasonable quantity of fruit, vegetables, whole grains, and other healthy foods, lots of people eat too many hamburgers, cookies and chips. Many people just eat too much food in general.

 One result is the spread of obesity, which has enlarged the waistlines of millions of adults and kids. The increase in obesity has led to an increase in the number of people with diabetes（糖尿�。�, heart disease, cancer and other diseases.

 But for many other people, food has become their enemy. They worry so much about getting fat that they either severely limit what they eat or make themselves throw up right after eating. Doctors say that these people have eating disorders.

 Eating disorders among teens are far less common than obesity, yet the health problems of eating disorders can be just as serious as obesity.

 Not eating enough can lead to heart attacks, weak bones,, organ damage and fainting spells. Repeatedly throwing up causes chemical imbalances in the body, makes your teeth weak and destroys stomach lining （胃粘膜）.

 Researchers are doing research on what causes certain people to develop eating disorders, why some people are more in danger than in others, and what kind of education programs work best to prevent people from doing dangerous things to lose weight to stay slim.

 “It’s important to learn how to recognize signs of eating disorders in yourself, your family members and your friends,” a doctor says, “because research shows that getting treatment early is the key to a quick recovery.”

1. This passage mainly talks about_______.

 A. why some people eat too much food

 B. how people limit the food they eat

 C. the problems that people have with eating

 D. how eating disorders lead to many diseases

2. The underlined word in the third paragraph probably means “________”.

 A. being too fat     B. being too thin     C. being too worried     D. being too old

3. The purpose of writing this passage is to ________.

 A. let people realize the importance of healthy eating

 B. tell people what they should eat

 C. draw people’s attention to keeping fit

 D. warn people not to eat too much

4. According to the doctor, what is the most important thing for the early treatment of eating disorders?

 A. Getting a quick recovery.

 B. Knowing signs of eating disorders.

 C. Controlling what people eat.

 D. Knowing the reasons for eating disorders.