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
We’re always being told by the Department of Health to eat five portions of fruit and vegetables a day. But it’s not clear where
We’re always being told by the Department of Health to eat five portions of fruit and vegetables a day. But it’s not clear where
admin
2013-09-23
32
问题
We’re always being told by the Department of Health to eat five portions of fruit and vegetables a day. But it’s not clear where the evidence for this comes from and a large study by the European Prospective Investigation Into Cancer and Nutrition(Epic)two years ago of the dietary intake of more than 400, 000 people found only a weak link between eating fruit and vegetables and a reduction in overall cancer risk. There’s no evidence it reduces breast or prostate cancer.
Even so, how could anyone argue against eating more fruit and vegetables? Well, it depends what fruit you’re eating. A review article in the Canadian Medical Association Journal warns that a chemical in grapefruits can interact fatally with certain medicines. Even apple juice, the staple of many breakfast tables, may reduce our absorption of some drugs. Parents also often think fruit juice is a healthy alternative to soda drinks but juices contain sugar and calories too—as much as a glass of Coke(160 calories)—so should be drunk in moderation.
Grapefruit has also been linked to an increase in breast cancer. A study in the British Journal of Cancer(BJC)of 500, 000 post-menopausal women found that eating a quarter of the fruit a day increased the risk by 30% .
There is one good reason for not eating grapefruits—they taste sour. But they are unlikely to increase your risk of breast cancer; further research in the BJC showed no increase of breast cancer in pre-or post-menopausal women who tuck into grapefruits or drink juice.
Grapefruit contains a type of chemical called furanocoumarin(also found in Seville oranges and limes but not Valencia or other sweet oranges), which, by inhibiting the enzyme CYP3A4, stops the breakdown of some prescription drugs. So the concentrations of these drugs rise and can have serious side-effects, including kidney damage, heart block(where no electrical impulses pass through the heart and it can stop beating), and deep vein thrombosis(which occurred when an oral contraceptive was taken by a woman who also ate grapefruit three days in a row).
Patient information leaflets should tell you what foods to avoid with which drugs. If in doubt, ask your doctor. So you don’t need to eat less fruit, and may still need to eat more. Another paper from the Epic study found a 22% reduction in deaths from heart attacks in people who ate eight portions of fruit and vegetables a day compared to those who ate three or fewer. The way the study is designed, however, means that it can only suggest a link—it can’t prove one.
What’s the author’s attitude towards eating fruit in the last paragraph?
选项
A、People shouldn’t eat fruit.
B、People should eat less fruit.
C、People may eat more fruit.
D、People should eat fruit in moderation.
答案
C
解析
细节题。从文章最后一段第三句可知,人们不需要少吃水果,并且可能仍然需要多吃水果,所以选[C]。[A]“人们不应该吃水果”与[B]“人们应该少吃水果”均不符合文意,故排除;[D]“人们应该适量吃水果”,虽然在文中有提及,但是其在第二段的最后一句,而非最后一段,所以排除。
转载请注明原文地址:https://kaotiyun.com/show/xHLK777K
0
专业英语四级
相关试题推荐
Shewalked7milestodayinordertoloseweight;Ineverimaginedthatshecouldwalk_______far.
Educatorstodayismoreandmoreoftenhardtosaythatcomputerliteracyisabsolutelynecessaryforcollegestudents.Manyeve
WriteonANSWERSHEETTWOacompositionof200wordsonthefollowingtopic:GoodHealthIsImportanttoStudent
whyistheweightlossplancalledtheScarsdalediet?
Inthedigitalrealm,thingsseemalwaystohappenthewrongwayround.WhereasGooglehashurriedtoscanbooksintoitsdigita
Inthedigitalrealm,thingsseemalwaystohappenthewrongwayround.WhereasGooglehashurriedtoscanbooksintoitsdigita
FormerU.S.PresidentGeorgeW.BushappearedonNBCtelevisionto
Hisignorancewasasremarkableashisknowledge.Ofcontemporaryliterature,philosophyandpoliticsheappearedtoknownextt
随机试题
下列程序段运行结束后,变量c的值是()。a=24b=328selectcaseb\10case0C=a*10+bcase1to9C=a*100+bcase
线性表采用链式存储时,结点的存储地址()。
刀剪刃性器械最佳消毒法是()。
男性,70岁,超声检查见主动脉瓣增厚钙化,开放受限,关闭不拢,升主动脉扩张。诊断为主动脉瓣狭窄伴关闭不全,拟行手术治疗
下列属于Altman的Z评分模型中的财务比率的是()。
作业成本管理中进行成本节约的途径主要有()。
现代物流功能包括运输、保管和配送等。()
为唤起世界各国更加重视保护和发展森林资源,推进全球性植树运动,积极维护生态安全,共同应对气候变化,第67届联合国大会通过决议,确定每年()为“国际森林日”。
方程xy’+2y=sinx满足条件y|x=π=的特解为________.
SPOOLing是一种典型的虚拟设备技术,它能够解决处理机和设备之间的【 】不匹配问题。
最新回复
(
0
)