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
For years, doctors advised their patients that the only thing taking multivitamins does is give them extensive urine(尿). After a
For years, doctors advised their patients that the only thing taking multivitamins does is give them extensive urine(尿). After a
admin
2015-01-26
72
问题
For years, doctors advised their patients that the only thing taking multivitamins does is give them extensive urine(尿). After all, true vitamin deficiencies are practically unheard of in industrialized countries. Now it seems that those doctors may have been wrong. The results of a growing number of studies suggest that even a modest vitamin shortfall can be harmful to your health. Although proof of the benefits of multivitamins is still far from certain, the few dollars you spend on them is probably a good investment.
Or at least that’s the argument put forward in the New England Journal of Medicine. Ideally, said Dr. Walter Willett and Dr. Meir Stampfer of Harvard, all vitamin supplements would be evaluated in scientifically rigorous clinical trials. But those studies can take a long time and often raise more questions than they answer. At some point, while researchers work on figuring out where the truth lies, it just makes sense to say the potential benefit outweighs the cost.
The best evidence to date concerns folate(叶酸), one of the B vitamins. It’s been proved to limit the number of defects in embryos(胚胎), and a recent trial found that folate in combination with vitamin B12 and a form of B6 also decreases the re-blockage of arteries after surgical repair.
The news on vitamin E has been more mixed. Healthy folks who take 400 international units daily for at least two years appear somewhat less likely to develop heart disease. But when doctors give vitamin E to patients who already have heart disease, the vitamin doesn’t seem to help. It may turn out that vitamin E plays a role in prevention but cannot undo serious damage.
Despite vitamin C’s great popularity, consuming large amounts of it still has not been positively linked to any great benefit. The body quickly becomes saturated with C and simply excretes(排泄)any excess.
The multivitamins question boils down to this: Do you need to wait until all the evidence is in before you take them, or are you willing to accept that there’s enough evidence that they don’t hurt and could help?
If the latter, there’s no need to go to extremes and buy the biggest horse pills or the most expensive bottles. Large doses can cause trouble, including excessive bleeding and nervous system problems.
Multivitamins are no substitute for exercise and a balanced diet, of course. As long as you understand that any potential benefit is modest and subject to further refinement, taking a daily multivitamin makes a lot of sense.
It can be seen that large doses of multivitamins______.
选项
A、may bring about serious side effects
B、may help prevent excessive bleeding
C、are likely to induce the blockage of arteries
D、are advisable for those with vitamin deficiencies
答案
A
解析
事实细节题。文章倒数第二段末句提及过量的服用会造成一些问题(can cause trouble),包括流血不止和神经系统方面的问题(including excessive bleeding and nervous system problems)。选项A中serious side effects(严重的副作用)与文章信息对应。故答案为A。
转载请注明原文地址:https://kaotiyun.com/show/EtLO777K
0
考博英语
相关试题推荐
Inthesecondhalfofeachyear,manypowerfulstormsareborninthetropicalAtlanticandCaribbeanseas.Of【1】,onlyaboutha
Nobodyinthecompanypaysattentiontohisopinion,becausewhathehassaidisalwaysmere______.
Drivestraightahead,andthenyouwillseea______totheShanghai-NanjingExpressway.
Ifyoutakea(n)______courselikeheryoucanlearnEnglishinlessthantwoyears.
Inthepast,Americancollegesanduniversitieswerecreatedtoserveadualpurpose—toadvancelearningandtoofferachancet
Inthepast,Americancollegesanduniversitieswerecreatedtoserveadualpurpose—toadvancelearningandtoofferachancet
Bush’sfirstmajorpoliticalsetbackwasthedownfallofhisoriginalchoiceforsecretaryofdefense-JohnG.Tower,whowasdisc
Herspirits______atthethoughtofalltheworkshehadtodothatmorning.
Itcomesasnosurprisethatsocietieshavecodesofbehavior.Thecharacterofthecodes,ontheotherhand,canoftenbe_____
Famedfortheirhigh-elevationforests,theAppalachianMountainssweepsouthfromQuebectoAlabama.HighestinNewEnglandand
随机试题
A.高度水肿随体位而变化B.水肿指压凹陷不明显C.限于眶周D.体腔积液甚为少见E.水肿从踝部开始单纯性肾病的水肿
牵引的种类。
Windows7“资源管理器”的打开方法有很多,下列叙述错误的是________。
关于腹直肌的描述,正确的是()
下列不属于逆行肾盂造影的术前准备的是
M股份有限公司(以下简称“M公司”)为一家通信设备制造企业。2×13年,M公司发生了如下交易或事项:(1)12月10日,M公司与甲公司达成协议,由甲公司向M公司投入4000万元,获得M公司30%的股权,M公司于当日收到该款项。同时协议约定M公司每年向甲公
古代园林治水之法,有掩、隔、破三种。()
王安石的《伤仲永》里的“仲永”说明了()在人的身心发展中不起决定作用。
图为我国某山地降水量随高度变化示意图,读图。就相同海拔高度来说,该山地南北两坡年降水量()。
下列各选项中,不属于序言性注释的是()。
最新回复
(
0
)