专业术语—低脂食物并不能减少健康风险1
Low-Fat Diet Does Not Cut Health Risks, Study Finds
By GINA KOLATA
The largest study ever to ask whether a low-fat diet reduces the risk of getting cancer or heart disease has found that the diet has no effect.
The largest study ever to ask whether a low-fat diet reduces the risk of getting cancer or heart disease has found that the diet has no effect.
The $415 million federal study involved nearly 49,000 women ages 50 to 79 who were followed for eight years. In the end, those assigned to a low-fat diet had the same rates of breast cancer, colon 1 cancer, heart attacks and strokes as those who ate whatever they pleased, researchers are reporting today.
"These studies are revolutionary," said Dr. Jules Hirsch, physician in chief emeritus 2 at Rockefeller University in New York City, who has spent a lifetime studying the effects of diets on weight and health. "They should put a stop to this era of thinking that we have all the information we need to change the whole national diet and make everybody healthy."
The study, published in today's issue of The Journal of the American Medical Association, was not just an ordinary study, said Dr. Michael Thun, who directs epidemiological research for the American Cancer Society. It was so large and so expensive, Dr. Thun said, that it was "the Rolls-Royce of studies." As such, he added, it is likely to be the final word.
"We usually have only one shot at a very large-scale trial on a particular issue," he said.
The results, the study investigators 3 agreed, do not justify 4 recommending low-fat diets to the public to reduce their heart disease and cancer risk. Given the lack of benefit found in the study, many medical researchers said that the best dietary advice, for now, was to follow federal guidelines for healthy eating, with less saturated 5 and trans fats, more grains, and more fruits and vegetables.
Not everyone was convinced. Some, like Dr. Dean Ornish, a longtime promoter of low-fat diets and president of the Preventive Medicine Research Institute in Sausalito, Calif., said that the women did not reduce their fat to low enough levels or eat enough fruits and vegetables, and that the study, even at eight years, did not give the diets enough time.
- Here,too,the colon must be followed by a dash.这里也是一样，应当在冒号后加破折号。
- The colon is the locus of a large concentration of bacteria.结肠是大浓度的细菌所在地。
- "Perhaps I can introduce Mr.Lake Kirby,an emeritus professor from Washington University?"请允许我介绍华盛顿大学名誉教授莱克柯尔比先生。
- He will continue as chairman emeritus.他将会继续担任荣誉主席。
- This memo could be the smoking gun that investigators have been looking for. 这份备忘录可能是调查人员一直在寻找的证据。
- The team consisted of six investigators and two secretaries. 这个团队由六个调查人员和两个秘书组成。 来自《简明英汉词典》
- He tried to justify his absence with lame excuses.他想用站不住脚的借口为自己的缺席辩解。
- Can you justify your rude behavior to me?你能向我证明你的粗野行为是有道理的吗？