首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
医学
Many people have been keeping on diet in the belief that cutting fat automatically cuts the risk of heart disease and cancer, to
Many people have been keeping on diet in the belief that cutting fat automatically cuts the risk of heart disease and cancer, to
admin
2013-11-30
20
问题
Many people have been keeping on diet in the belief that cutting fat automatically cuts the risk of heart disease and cancer, too. Not so, says research published last week in the Journal of the A-merican Medical Association. Women who trimmed the fat from their diets were just as vulnerable to colon cancer, breast cancer, and heart disease as women who did not.
The message? A low-fat diet isn’ t equivalent to a healthful diet, says Marcia Stefanick, a physiologist at Stanford University’ s Prevention Research Center, who helped run the government-sponsored study. Some 49,000 women between ages 50 and 79 were divided into two groups and followed for an average of about eight years as part of the Women’ s Health Initiative. One group was instructed to cut fat intake to 20 percent of total calories and to eat at least five daily servings of fruits and vegetables and six of grains. The other women were left to eat as they pleased. In the end, both groups had about the same occurrence of colorectal cancer, stroke, and heart disease. A slight difference in the rate of breast cancer among the lower-fat-diet women might be explained by chance alone.
There is hardly a green light to go on a junk-food binge, though, researchers’ caution. For one thing, the women on the diet didn’ t hit their target; they whittled fat intake just to 29 percent—from about 35 percent—by the end of the sixth year of the study. Moreover, there commended diet made no distinction between "good" unsaturated fats and "bad" saturated fats and trans fats, whose importance to heart health has been recognized since the data-gathering started. And since all the women in the study were eating fairly healthfully beforehand, it’ s possible that the small changes in vegetable and grain consumption by the dieting group weren’ t big enough that any benefits registered. Rather than focus on total fat intake, Stefanick advises, go easy on foods containing saturated fats and trans fats and eat more vegetables and fruits and whole grains.
Long-term health may depend more on achieving a healthy body weight and getting regular exercise than on cutting out fat, says Tim Byers, an epidemiologist at the University of Colorado Health Sciences Center in Denver. Overweight people who " lower fat but don’ t control calories can only make tiny changes to their chronic disease risk," he says. Until the links between disease and diet are fully understood, there are other ways to protect yourself; get your cholesterol and blood pressure checked, and schedule that colonoscopy and mammogram. No matter what you eat, says Byers, a long life means knowing early where the problems lie.
We learn from the first paragraph that______.
选项
A、cutting fat means cutting the risk of heart diseases
B、keeping on a low-fat diet helps to reduce the chance for cancer
C、cutting down the fat from diets does not help women keep away from cancer
D、many women cannot stick to low-fat diet
答案
C
解析
文章第一段第一句话指出“减少饮食中脂肪的摄入量可以降低癌症,心脏病发病率”,但是第二句话:Not so,says research published last week马上否决了这种观点。故本题应选C项。
转载请注明原文地址:https://kaotiyun.com/show/4xU3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
周围神经损伤后,不适于判断神经功能恢复情况的检查是
男,50岁,20年前曾患肺结核,近3个月来出现刺激性咳嗽,痰中带血丝,伴左胸痛、发热,X线片示右上肺3cm×2.5cm大小的阴影,边缘模糊,痰液找癌细胞三次均为阴性。应考虑诊断为
女,45岁,间歇性右上腹痛伴皮肤巩膜黄染,发热10天,加重3天入院。治疗期间突然出现寒战、高热,体温39.4℃,神志淡漠,面色苍白,皮肤厥冷,手足冰冷,脉率125次/分,血压70/45mmHg。根据患者的临床表现,其目前应处于
Environmentalofficialsinsistthatsomethingbedoneto______acidrain.
TherewereredfacesatoneofBritain’sbiggestbanksrecently.Theyhadacceptedatelephoneordertobuy$100,000worthof
ItissaidthatinEnglanddeathispressing,inCanadainevitableandinCaliforniaoptional.Smallwonder.Americans’lifeexp
At9:00intheeveningonJanuary29,justasPresidentGeorgeW.BushwasabouttobeginhisfirstStateoftheUnionaddress,
Jacksonville,Illinois,hasmorecollegesandstateinstitutionspercapitathananyothercityinthatstate.
Ican’tpossiblymarkyourhomework:yourhandwritingis______.Youmustspendtimeinimprovingit.
随机试题
心理学家认为,自卑感起源于人在幼年时期由于无能而产生的不胜任和痛苦的感觉。产生自卑感的原因有()
在Word2010中,下列关于页眉、页脚的叙述,错误的是()
心室肌细胞平台期的主要跨膜离子流是
施工平面布置图的设计原则有()。
个人汽车贷款的借款人需要调整借款期限的前提条件不包括()
银行业从业人员不允许有任何礼物收送的行为。()
已知a,b为实数,i是虚数单位.若(a一2i)i=b一i,则a2+b2=[].
在窗体上画一个文本框(名称为Text1)和一个标签(名称为Label1),程序运行后,在文本框中每输入一个字符,都会立即在标签中显示文本框中字符的个数。以下可以实现上述操作的事件过程是( )。
对于长度为n的线性表,若进行顺序查找,则时间复杂度为【】。
A、Theywillfeelannoyed.B、Theywillbesurprised.C、Theywillfeelintimated.D、Theywillbeimpressedbythem.D
最新回复
(
0
)