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
考研
Taking a multivitamin around the time of conception may help women lower their risk of delivering low-birth-weight babies, a new
Taking a multivitamin around the time of conception may help women lower their risk of delivering low-birth-weight babies, a new
admin
2016-08-02
34
问题
Taking a multivitamin around the time of conception may help women lower their risk of delivering low-birth-weight babies, a new research shows. The study, one of the first to look at multivitamin use immediately before and after conception, strengthens the notion that nutritional deficiencies may increase the risk of birth complications.
Still, the researchers cautioned that it was too soon to recommend multivitamins for women who are contemplating pregnancy or already expecting. While some studies have suggested benefits, others have found that women who eat a healthy diet have no need for multivitamins, and that vitamins may even do some harm, especially when their use is continued late into a pregnancy.
The study, published in the September issue of The American Journal of Clinical Nutrition, analyzed data on nearly 36,000 Danish women enrolled in a national birth registry. The scientists who carried out the research found that a large share of the women—about 60 percent had been taking multivitamins in the four weeks before and eight weeks after the last menstrual period. After adjusting for a number of risk factors, like smoking, weight and the age of the mother, the study found that women who took a daily multivitamin and were of normal weight had a nearly 20 percent lower chance of delivering a preterm baby, compared with those who did not take a daily multivitamin. Women who were overweight did not see the same benefit, though it was unclear why.
In 2004, a study by scientists at Emory University and the Centers for Disease Control and Prevention found that taking daily multivitamins was a widespread practice among expectant mothers in the United States. Up to 78 percent of pregnant women reported taking multivitamins, the study found, compared with only 47 percent of women who were not pregnant.
Doctors have long encouraged pregnant women and those contemplating pregnancy to take folic acid—a B vitamin—daily to help prevent neural tube defects. Folic acid is the synthetic form of folate, a member of the family of B vitamins that is involved with DNA synthesis and DNA methylation. Because of these crucial functions, folate plays important roles in fetal development and nerve tissue health. And since the late 1990s, the government has also required food makers to add the vitamin to many grain products, including flour and breads. The authors of the latest study suggested that there could be other nutrients in multivitamins besides folic acid that help reduce the risk of birth complications. But they also said that more, research was needed, and that they were not recommending that women trying to conceive should start a daily multivitamin regimen.
According to Paragraph 2, which one of the followings is not a reason for not recommending multivitamins to pregnant women?
选项
A、women who eat a healthy diet have no need for multivitamins
B、taking multivitamins may increase the risk of birth complications
C、vitamins may even do some harm for pregnant women
D、vitamins may especially harm pregnant women during late pregnancy
答案
B
解析
本题考查考生对第二段内容的理解。第二段承接上文,指出虽然孕期服用多种维生素可能带来好处。但是却并不推荐,接着给出了原因,即:在其他的研究中发现,保持健康饮食习惯的孕妇.并不需要补充多种维生素荆,甚至服用维生素可能造成损害,尤其是在怀孕后期继续服用维生素。分别对应A、C和D。B是错误说法,文章讨论的服用多种维生素的好处之一就是可能降低分娩综合征的风险,而不是增加。本题是选非,因此选择B。
转载请注明原文地址:https://kaotiyun.com/show/S6oZ777K
0
考研英语一
相关试题推荐
InGeorgeOrwell’sAnimalFarmthemightycart-horse,Boxer,inspirestheotheranimalswithhisheroiccryof"Iwillworkhard
Ifyou’relikemostpeople,you’rewaytoosmartforadvertising.Youfliprightpastnewspaperadsandneverclickonadsonlin
Leadershipishardlyanewareaofresearch,ofcourse.Foryears,academicshavedebatedwhetherleadersarebornormade,whet
Don’ttalk:yourcellphonemaybeeavesdropping.Thankstorecentdevelopmentsin"spyphone"software,ado-it-yourselfspook
Birth,growth,decline,death:itistheusualcycleforpeople,companiesandindustries.Butthestoryofviolin-makinginCre
Icametofeminismthewaysomepeoplecometosocialmovementsintheirearlyyears:outofself-interest.Igotontheequalit
Duringuncertaintimes,peopletendtolookbackandwonderhowitgottothis.Theyfeelmorekeenlytheirmissedopportunities
AlisonPrestonoftheUniversityofTexasatAustin’sCenterforLearningandMemoryexplains:Ashort-termmemory’sconversiont
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportance.Theinnerworkingsofourownbrainswefeelto
Therecentannouncementthatgeneralpractitioners(GPs)maysendpatientswithdepressionawaywiththesuggestionthatthey【C1】_
随机试题
2013年9月2日3时16分,我国在________卫星发射中心用长征四号丙运载火箭,成功将遥感卫星十七号发射升空,卫星顺利进入预定轨道。()
属于维持平衡的躯体感觉输入为
影响全口义齿固位的因素很多,下列哪一项不是
百会穴在头正中线上,其具体位置在
1.背景某项目经理部负责本地网直埋光缆线路环网工程的施工,合同规定采用包工不包料的形式承包,工程的路由报建工作已由建设单位完成,工程于4月15日开工,工期37天。该工程包括三个中继段,其中A中继段为50km、B中继段为60km、C中继段为70km
《淮南子》提出了独特的治国方略,它们是()。
关于重力势能,以下说法正确的是()。
给定资料1.一颗来自澳大利亚塔斯马尼亚岛的樱桃,从靠泊洋山保税港区码头到查验后放行,最快需要多长时间?上海给出的答案是:6小时。如此迅疾的速度,得益于上海自贸区成立3年多以来致力于攻坚的核心任务——制度创新。上海自贸试验区建设3年多以来
选出下列文化常识的有关内容。秀才、举人、贡士、进士依次是封建社会科举考试中______、______、______、______的合格者。
A、Hisformerheadmaster.B、Hisformerclassmate.C、Hisformerclosestfriend.D、Hisformerlunchlady.D①选项都是指人的名词,预测问题与人物相关。②问题
最新回复
(
0
)