Passage Thirteen It was once believed that being overweight was healthy, but nowadays few people subscribe to this viewpoint. While many people are fighting the battle to reduce weight, studies are being conducted concerning the (1) and how it is controlled by both emotional and biochemical factors. Some of the (2) of these studies may give insights into how to deal with weight problems. For example, when several hundred people were asked about their eating habits in times of stress, 44 percent said they reacted to stressful situations by eating. Further investigations with both humans and animals indicated that it is not food which (3) tension but rather the act of (4) A test in which subjects were blindfolded showed that obese (肥胖的) people have a keener sense of taste and crave (渴望) more flavorful food than non-obese people. When deprived of the variety and (5) of tastes, obese people are not satisfied and consequently eat more to (6) this need. Blood (7) taken from people after they were shown a picture of food revealed that overweight people reacted with an increase in blood insulin (胰岛素), a chemical (8) with appetite. This did not happen to average-weight people. Exercise has been (9) as an important part of a weight-loss program. However, it has been found that mild exercise, such as using the stairs instead of the (10) , is better in the long run than taking on a strenuous program, such as jogging, which many people fred difficult to continue over long periods of time and which also increases appetite.
A. appetiteD. intensityG. samplesJ. associated M. promotes
B. conclusionsE. fulfillH. elevator K. estimated N. problems
C. chewingF. relievesI. recommended L. region O. digesting