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
外语
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Research
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Research
admin
2011-01-06
65
问题
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Researchers are finding that what you eat may interfere with cancer growth at various stages. For example, certain foods can block the chemicals that initate cancer. Antioxidants(抗氧化剂), found in some vitamins and minerals, can snuff out oxygen free radicls (氧自由基), substances that are thought to make cells more susceptible to cancer, and they can even repair some of the cellular damage that has been done. And some food—wheat bran(麦,糠) in particular—has been shown to shrink precancerous(癌症前期的) cells.
A recent review of 17 studies from 17 nations reveals that people who eat the most fruits and vegetables have about half the cancer raters of those who eat the least. In fact, some research suggests that frequent consumption of fruits and vegetables can cut the risk of lung cancer even in smokers.
One of the most studied antioxidants in vegetables and fruits thought to protect against cancer is beta-carotene(β胡萝卜素), concentrated in deep green, yellow and orange vegetables such as carrots, sweet potatoes and spinach.
Research also shows that beta-carotene can change in the body to retinoic acid (维生素A酸), a substance used in clinical trials to treat certain cancers.
Here are some of the foods that contain cancer-fighting chemicals.
Tomatoes. One of the compounds in tomatoes that is thought to reduce the risk of cancer is lycopene(蕃茄素), the pigment (色素) that makes tomatoes red. Lycopene, an antioxidant that is also found in watermelons and apricots, quenches certain cancer-triggering oxygen free fadicals. Healthy people with the most blood lycopene.
Green Vegetables. A recent Italian study showed that dark-green leafy vegetables lower the risk of many cancer. Spinach, broccoli, kale and dark-green lettuces are chock-full of antioxidants, including beta-carotene, folate(叶酸) and lutein(叶黄素).A good rule of thumb(单凭经验的做法) : the darker the vegetable, the more antioxidants within.
Pungent preventives(刺激性的预防物). A whole host of chemicals thought to have cancer-inhibiting properties have been identified in allium vegetables, which include garlic, onions and scallions(大葱). Animal studies show that many of these chemicals block carcinogens that have been linked to colon, stomach, lung and liver cancer. A study at Pennsylvania State University found that feeding rats various garlic extracts and preparations(配制好的食物) reduced mammary tumors by as much as 71 percent. In humans, studies suggest that those who eat more onions and garlic are less prone to gastrointestinal cancer.
Research suggests that garlic compounds may even interfere with cancer progression. A recent German study found that ajoene, a garlic compound, is toxic to malignant cells. Garlic may also antagonize existing cancer by boosting(促进) immune functions, according to researchers at Loma Linda University School of Medicine. Their study, done on mice, found that garlic’s sulfur compounds increased the activity of macrophages and T-lymphocytes(淋巴细胞), two of the components of the immune system that destroy tumor ceils.
Citrus fruit may be particularly effective in reducing the risk of pancreatic cancer.
选项
A、Right
B、Wrong
C、Not mentioned
答案
C
解析
该句句意为“柑橘可能在降低胰腺癌危险性方面特别有效。”但文中并未提到这点。
转载请注明原文地址:https://kaotiyun.com/show/2zmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
CarsaccountforhalftheoilconsumedintheU.S.,abouthalftheurbanpollutionandonefourththegreenhousegases.Theyta
1.Theterm"jointinternationalbusinessventure",jointventureforshort,hascometomeanmanythingstomanypeople.Itsom
1.WhenChristopherColumbusLandonAmerica’sshores,heencounteredcopper-shinnedpeoplewhomhepromptlycalled"Indians".C
Ifyouintendusinghumorinyourtalktomakepeoplesmile,youmustknowhowtoidentifysharedexperiencesandproblems.Your
1.Peoplehavewonderedforalongtimehowtheirpersonalitiesandbehaviorsareformed.It’snoteasytoexplainwhyoneperso
Readthefollowingarticleandchoosethebestwordforeachspace.Forquestions26-45,markoneletterA,B,CorDonyou
Lookatthetenstatementsforthispart.Youwillhearapassageabout"AResearchonSleep".Youwilllistentoittwice.
YouaregoingtoreadamagazinearticleaboutamanwhoteacheschildrenhowtoimprovetheirmemoryChoosethemostsuitableh
A.ConfirmationoftheNewEffectB.Pain-relievingandFever-reducingEffectsofAspirinC.TheIgnoredSignificantObservation
Womenworeuncomfortablebathingclothesbecause______.Thebathingmachinewasused______.
随机试题
女性,25岁,外伤后右侧股骨髁上骨折,在转院途中突然出现患肢剧痛,足背动脉搏动消失,足趾苍白、麻木发凉,小腿张力增高,局部有水疱,牵拉足趾引起小腿疼痛。其临床诊断是
水轮包括有,除了:
患者,男,20岁。左踝部疼痛,行走时加重,喜温热,舌苔白,脉弦紧。治疗应首选
在选择确定焊接电流的大小时,应考虑的最为关键的因素是()。
下列关于相关单位的安全责任的表述中,正确的是()。
如果建筑内空间面积过大,火灾时则燃烧面积大、蔓延扩展快,因此在建筑内实行(),可有效地控制火势的蔓延,既利于人员疏散和扑火救灾,也能达到减少火灾损失的目的。
下列各项属于固有特性的是()。
最能反映土地利用强度的指标是()。
确定下列无穷小量当x→0时关于x的阶数:(Ⅰ)f(x)=ex-1-x-xsinx;(Ⅱ)f(x)=cosx-1.
SpeakerA:______SpeakerB:It’sSaturday.
最新回复
(
0
)