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
57
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.
The effect of the chemical in grapefruits on certain medicine might NOT lead to______.
选项
A、breast cancer
B、kidney damage
C、heart block
D、deep vein thrombosis
答案
A
解析
细节题。由第五段第二句可知,西柚含有的化学物质对某些药物产生的影响可能产生严重的副作用,包括肾损害、心脏传导阻滞和深静脉血栓形成,所[A]“乳腺癌”和文意不符,故为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/RHLK777K
0
专业英语四级
相关试题推荐
RhodeIslandwasthe【C1】______ofAmericantennis:whentheUnitedStatesNationalChampionships(nowtheUnitedStatesOpen)w
Acommonassumptionabouttheprivatesectorofeducationisthatitcatersonlytotheelite.【C1】______recentresearchpoints
Shewalked7milestodayinordertoloseweight;Ineverimaginedthatshecouldwalk_______far.
Educatorstodayismoreandmoreoftenhardtosaythatcomputerliteracyisabsolutelynecessaryforcollegestudents.Manyeve
WriteonANSWERSHEETTWOacompositionof200wordsonthefollowingtopic:GoodHealthIsImportanttoStudent
Weoftenadvisehimnottodrinkmorewinethan______forhishealth.
______,healwaystrieshisbesttocompleteitontime.
Thedoctoradvisedhimtostayinbed,sayinghewasmuch_________.
______abouthisfather’shealthconditionthathecan’tsleepatnight.
Despitethefactthatthediseaseisso______,treatmentisstillfarfromsatisfactory.
随机试题
社会学形成时期的代表人物有【】
影响价格的基本因素包括()
A.祛风通络,利水B.祛风湿,强筋骨,利水消肿C.祛风湿,杀虫解毒D.祛风湿,消痰水E.祛风通络,凉血消肿桑枝的功效是
下列关于机械传动式钢筋切断机安全操作要点的论述中,错误的是()。
某制造企业2014年取得商品销售收入3000万元,出租设备租金收入200万元,发生与生产经营有关的业务招待费支出18万元。根据企业所得税法律制度的规定,该企业在计算当年应纳税所得额时,准予扣除的业务招待费为()万元。(2015年)
甲公司2014年度至2016年度对乙公司债券投资业务的相关资料如下:(1)2014年1月1日,甲公司以银行存款1800万元购入乙公司当日发行的5年期公司债券,作为持有至到期投资核算,该债券面值总额为2000万元,票面年利率为5%,每年年末支付当年利息,到
游览活动中因旅游者个人过错造成走失,旅游者被找到后,导游人员应该对他()。
唐代时期,“以刑律分类为门,附以格敕”编纂而成的法律是()。
A、Ahighschoolstudent.B、ChiefeditorofPrincetonReview.C、AuthorofTheBest361Colleges.D、ATVhost.C细节题。该对话开篇就介绍道:Well
A、Becauseshehasgotanappointment.B、Becauseshedoesn’twantto.C、Becauseshehastowork.D、Becauseshewantstoeatina
最新回复
(
0
)