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
59
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.
According to the author, clinical trials of vitamin supplements______.
选项
A、often result in misleading conclusions
B、take time and will not produce conclusive results
C、should be conducted by scientists on a larger scale
D、appear to be a sheer waste of time and resources
答案
B
解析
事实细节题。文章第二段提及所有的维生素供应都会在实验的基础上进行科学的评估,之后第三段提及But those studies can take a long time and often raise more questions than they answer,选项B与此信息一致。故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/ItLO777K
0
考博英语
相关试题推荐
ThehistoryofAfrican—Americansduringthepast400yearsistraditionallynarrated【1】anongoingstruggleagainst【2】andindiffe
Hereissomeadviceonfoodshopping.The【1】familyspendsaboutone-sixthofitsincome【2】food.Becausefoodisexpensive,itis
GiordanoBrunostronglysupportedCopernicus’sideathattheearthwasnotthecenteroftheuniverse.Brunowasrewardedbybei
Hisexplanationmadetheproblem______.
DuringthefirstyearthatMr.WordsworthandIwereneighbours,ourconversationsturnedfrequentlyonthetwocardinalpoints
Inthepast,Americancollegesanduniversitieswerecreatedtoserveadualpurpose—toadvancelearningandtoofferachancet
Muchhasbeenwrittenaboutpovertybutnoneoftheaccountsseemtogetattherootoftheproblem.Itmustbenotedthatthew
InNovember1970YukioMishima,togetherwithsomeofhisfanaticalfollowersfromtheultranationalisticShieldSocietywhichh
Wheneveryouseeanoldfilm,evenonemadeaslittleastenyearsago,youcannothelpbeingstruckbytheappearanceofthewo
IncomeinequalityintheUnitedStatesremainedrelativelystableforaperiodofnearlyfortyyears.Beginninginthe1970’s,h
随机试题
病毒性肝炎的临床类型不包括
张某花费50万元购买了一栋房屋,为房屋投保了一份财产险,保险金额为100万元,以下说法正确的是()
某500kV变电站,站址海拔2100m,500kV出线本期2回,最终6回;主变压器本期1组750MVA,最终2组,220kV出线本期8回,最终12回。该变电站220kV最终最合理的接线应为()。
项目资本金财务盈利能力分析是融资后()分析,是针对项目资本金获利能力的分析。
某建设工程公司承包了一座倒闭化工厂厂房及设备的拆除工程,业主为当地政府。厂房为二层结构,一层为钢筋混凝土框架结构,二层为轻钢结构,墙面为100mm厚矿棉芯彩板。在拆除槽罐时,发现有的里面还有残存的硫酸;有的里面还有残存的粉状原料。施工人员对于残存硫酸,用
仲裁庭裁决劳动争议案件,案情不需要延期的,应当自仲裁委员会受理仲裁申请之日起()内结束。
甲股份有限公司(以下简称“甲公司”)为上市公司,2013~2014年发生的相关交易或事项如下:(1)2013年7月30日,甲公司就应收A公司账款6000万元与A公司签订债务重组合同。合同规定:A公司以其拥有的一栋在建写字楼及一项长期股权投资偿付该项债务;A
根据下表,回答问题。2002年至2005年城市居民对住房改革问题的平均关注程度()。①高于对环境保护的平均关注程度②低于对社会保障的平均关注程度③高于对下岗就业的平均关注程度④低于对经济增长的平均关注程度
结构化程序设计的基本原则不包括
4个元素A、B、C、D依次入栈,入栈过程中允许栈顶元素出栈,假设某一时刻栈的状态是c(栈顶)、(栈底),则不可能的出栈顺序是()。
最新回复
(
0
)