高考英语《流行话题 语境识词4500》Unit 84 Liposuctions Limits素材.docVIP

高考英语《流行话题 语境识词4500》Unit 84 Liposuctions Limits素材 Unit 84　Liposuctions Limits　　Doctors have long suspected that excess fat around the belly -- as opposed to the thighs or hips -- increases the chances of developing heart disease, high blood pressure and diabetes. Apparently, belly fat doesnt just lie there and jiggle. It actively promotes ill health by, among other things, pumping out inflammatory proteins and interfering with the bodys ability to use insulin. So it seemed plausible to many physicians that surgically removing belly by liposuction could give patients a double benefit: a slimmer figure and a better metabolic profile.　　Thats why there was such disappointment with the news, reported in the New England Journal of Medicine last week, that unlike losing weight the old-fashioned way -- by eating less and moving more -- liposuction makes no difference in a persons biological risk factors.　　Researchers in St. Louis, Mo., and Rome, Italy, conducted extensive tests on 15 obese women before and three months after they underwent liposuction. We removed 20 to 22 pounds of fat from each patient, says Dr. Samuel Kline, director of the Center Human Nutrition at Washington University in St. Louis. Thats twice as much fat as is usually removed. The women were instructed not to diet or exercise more until the experiment was over. All reported that they felt better and could move more easily after surgery. But with respect to their metabolic risk factors, Klein says, The data after the procedure were identical to the data before the procedure.　　How is that possible? Liposuction does not remove the fat cells found in the liver or the muscles, or the so-called visceral fat that surrounds internal organs. Nor does liposuction reduce the size of any remaining fat cells; large fat cells appear to produce more harmful proteins than do small ones. Some doctors believe the results would have been better if the patients had been only a few pounds overweight. In any case, the