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
Parents of children who happily eat what’s put in front of them might assume their kids are well nourished. But two new studies
Parents of children who happily eat what’s put in front of them might assume their kids are well nourished. But two new studies
admin
2017-04-13
63
问题
Parents of children who happily eat what’s put in front of them might assume their kids are well nourished. But two new studies drive home the importance of varying that diet. Deficiencies of vitamin D, omega-3 fats, and other healthful compounds are common; it turns out—and consequential.
Growing evidence links vitamin D deficiency not only to weak bones but also to impaired immunity, asthma, and diabetes among other problems. And some of the latest research finds that rates of asthma and related respiratory problems climb in kids who are short on other commonly missing essentials, including vitamins C and E and omega-3 fatty acids.
A team at the Harvard School of Public Health evaluated the diet and respiratory(relating to the process of breathing)health of some 2,000 North American high school seniors and found that teens who lack of fruit, vegetables, and other healthful foods were most likely to have problems such as coughing, panting, episodes of bronchitis, and asthma.
Vitamins C and E, which are abundant in fruit and dark-green vegetables, may "protect the lung from stress," says Harvard research fellow and study leader Jane Burns. Omega-3 reduces inflammation, a key feature of asthma, in which airways swell and make breathing difficult. Oily fish like salmon, mackerel, and tuna—as well as cod-liver oil—are rich in both omega-3 and vitamin D. Vitamin D can also be obtained from multivitamin milk and sunshine—and many kids should be getting more of both.
In another new study, researchers found that 55 percent of outwardly healthy children and teenagers they tested didn’t have enough vitamin D to grow healthy bones. Dark-skinned children were particularly likely to be short of the bone-building vitamin, according to Babette Zemel, an author of the study and director of the Nutrition and Growth Laboratory at Children’s Hospital of Philadelphia. The melanin(a natural dark brown colour in human skin, hair, and eyes)that makes their skin dark also blocks ultraviolet rays, which the body uses to make vitamin D. In winter, when the sun was weakest, more than 90 percent of blacks in the study were vitamin D deficient.
Researchers suggest pointing kids outside, and waiting a few minutes before putting on sun block; 10 minutes of midday summer sun provides 10,000 international units of the vitamin—more than enough for a day. Like melanin, sunblock prevents the skin from making vitamin D, so a bit of lotion-free exposure is necessary to grab the benefit.
Vitamin D deficiency will probably result in
选项
A、less bone fractures.
B、dark-colored skins.
C、suppressed immunity.
D、inability to breathe.
答案
C
解析
事实细节题。第二段第一句提到维生素D缺失会导致一些疾病,C项“免疫力下降”在提及的内容 之中。
转载请注明原文地址:https://kaotiyun.com/show/bBbZ777K
0
考研英语一
相关试题推荐
Homeworkhasneverbeenterriblypopularwithstudentsandevenmanyparents,butinrecentlyyearsithasbeenparticularlysco
AninternationalconferenceonglobalwarmingwillbeheldinBeijinginDecemberthisyear.Theorganizationcommitteeisnowl
AgingposesaseriouschallengetoOECD(OrganizationofEconomicCo-operationandDevelopment)countries,inparticular,howtop
AgingposesaseriouschallengetoOECD(OrganizationofEconomicCo-operationandDevelopment)countries,inparticular,howtop
It’snosecretthatthejobofapoliticalpollsterisgettingharderandhardereveryelectioncycle.Peoplearecuttingthela
Itistheurbandriver’smostagonizingeverydayexperience:thesearchforanemptyparkingplace.Circling,narrowlymissinga
Itistheurbandriver’smostagonizingeverydayexperience:thesearchforanemptyparkingplace.Circling,narrowlymissinga
Itistheurbandriver’smostagonizingeverydayexperience:thesearchforanemptyparkingplace.Circling,narrowlymissinga
随机试题
李某大学计算机专业毕业后首先进入一家互联网公司,从事网站建设与维护工作,后来,由于某些原因,他不得不选择离开这家公司。这段经历使他感受到了互联网的魅力,认为互联网具有无限商机,而且认为:只要存在信息不对称,信息就能够卖钱。因此,他想自己建立网站,涉足电子商
中医学认为与月经产生关系最密切的脏腑是
关于医德良心,下述提法中错误的是
品牌战略包括的内容有()。
下列()因素决定了实验室平面尺寸要求。
房屋租赁经纪服务费的收取为()。
247,18,229,-211,()。
某商店10月1日开业后,每天的营业额均以100元的速度上涨,已知该月15日这一天的营业额为5000元,问该商店10月份的总营业额为多少元?
A:Thisisoneofapair,isn’tit?B:Yes,madam.A:Well,canIseetheotherone,please?B:______.
人的一生好比马拉松赛跑。人人都有最后一圈,这一圈通常属于人生道路漫长的老人。七老八十的人,穿过艰难的世途,穿过芸芸众生,穿过重重障碍,于是到了人生的最后一圈。这一圈路程有长有短,跑得有快有慢。有的人稳健有力,从容不迫;有的人歪歪扭扭,步子不正;有
最新回复
(
0
)