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
(1) 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 w
(1) 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 w
admin
2018-05-14
38
问题
(1) 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.
(2) 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.
(3) Grapefruit has also been linked to an increase in breast cancer. A study in the British Journal of Cancer (BJC) of 500,000 postmenopausal women found that eating a quarter of the fruit a day increased the risk by 30%.
(4) 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 postmenopausal women who tuck into grapefruits or drink juice.
(5) 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).
(6) 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.
EPIC conducted a research two years ago to______.
选项
A、prove that people should eat five portions of fruit a day
B、find a way to reduce the overall cancer risk
C、determine the right amount of fruit that should be eaten every day
D、investigate the relation between eating fruit and reducing cancer risk
答案
D
解析
推断题。文章第一段第二句提到,两年前欧洲癌症与营养前瞻性调研协会对40多万人的饮食摄人情况进行了大规模研究,发现吃水果和蔬菜与减少癌症总发病率之间的关系不大,由此推知,该研究是为了调查吃水果和蔬菜与减少癌症总发病率之间的关系,所以选[D]。同时第一段第二句还提到每天应该吃五份水果和蔬菜这一说法的来源还不清楚,但并未提及该研究是否证明了这一说法,所以排除[A]“证明人们应该每天吃五份水果”;这一研究的目的只是调查吃水果和蔬菜与减少癌症总发病率之间的关系,而不是为了找到减少癌症总发病率的方法,因此排除[B];该句提到EPIC研究了40多万人的饮食摄入情况,但并未提及[C]“确定每天适当的水果摄入量”,故排除。
转载请注明原文地址:https://kaotiyun.com/show/iAxK777K
0
专业英语四级
相关试题推荐
Textbooks’DigitalFutureTherearealreadydigitaltextbooksavailable,andtheirnumbersareexpectedtogrow,/according
CultureTherearemanythingsaboutourlivesthatmakeupaculture.I.Language—Languageiswhatpeopleandanimalsuset
AmericanLiteratureI.ThebeginningoftheAmericanliterature—ColonistscametotheNewWorldtofindreligious【T1】and【T1】__
What’sthemainreasonforAmericanstogotothemovies?
WhichaspectofMarkTwain’slifedoesthepassagefocuson?
TeachersintheUnitedStatesearnlessrelativetonationalincomethantheircounterpartsinmanyindustrializedcountries,ye
Itishardtopredicthowscienceisgoingtoturnout,andifitisreallygoodscienceitisimpossibletopredict.Ifthethi
Thecouplehadnosoonergottothestation______thetrainleft.
(1)Patientsanddoctorshavelongunderstoodthepoweroftellingandlisteningtopersonalnarratives.Whetheramongpatientsi
(1)WearablegadgetslikesmartwatchesandGoogleGlasscanseemlikeafadthathasallthedurabilityofCBradiosorDuranD
随机试题
A.眶上神经B.泪腺神经C.睫状神经节的长根D.筛前神经E.睫状神经节短根额神经分出的是
心源性脑栓塞3h内最宜选用的治疗药物是()
患者,男性,70岁。较长时间大便干燥,近2周来,排便时疼痛伴出血,经检查,肛管皮肤全层裂开,形成溃疡,诊断为肛裂。采用坐浴等非手术治疗。该患者做直肠肛管检查时最合适的体位是
《特种设备安全监察条例》所称的特种设备类型包括()。
浙江浙海服装进出口公司(3313910194)在对口合同项下进口蓝湿牛皮(法定计量单位:千克),由浙江嘉宁皮革有限公司(3313920237)加工成牛皮沙发革。承运船舶在帕腊纳瓜港装货启运,泊停釜山港转“HANSASTAVANGER”号轮(航次号HV30
申请个人经营贷款的经营实体一般不包括()。
根据《国家赔偿法》第5条的规定,属下列情形之一的,国家不承担赔偿责任()。
警衔是区分人民警察等级的标志,也是国家给予人民警察的荣誉。根据规定,对具备条件的公发民警,可以提前晋升警衔。下列情形,可以成为公安民警提前晋升警衔条件的是()。
某研究者为了研究课堂教学过程中的师生交往活动,到某小学开展了分时段分项目课程教学的系统观察。这种观察属于()
Inthefirstparagraph,thewritertellsusthatstatusescanhelpus______.Accordingtothewriter,peopleoftenassumediffe
最新回复
(
0
)