问题 问答题 简答题

孕期什么时间开始补钙效果好,如何补钙?

答案

参考答案:

成年妇女体内约有1000克钙,怀孕以后需要增加50克左右的钙才能满足母体和胎儿需要。这些钙需要妊娠期膳食予以补充。孕妇如果长期缺钙或缺钙程度严重,会诱发小腿抽筋或手足抽搐,还可导致孕妇骨质疏松产生骨软化症,胎儿可能患先天性佝偻病。

孕妇从孕早期就应该开始注意膳食补钙,多吃牛奶、豆制品、虾皮、海鱼等含钙丰富的食品,预防缺钙。孕5个月以后孕妇钙的缺失逐渐明显,会引起小腿抽筋等症状,说明仅仅靠食物补钙已不能满足孕期对钙的需要,此时可以口服乳酸钙1克、维生素AD胶丸2粒,每天3次。口服维生素E100毫克每天1~2次。

选择题
完形填空
Recent studies show that only one out of three people have strong and healthy self-confidence. That  36 two out of every three people simply don’t know the 37 they already have to be successful when it’s  38  there in their hands!  39 if you want others to believe in you, you have to believe in yourself first. Remember: “No one can make you feel inferior (差的) unless you  40 them.” A successful businessman says, “You can’t push anyone up a ladder  41 he knows he can climb himself.”
Many of us have an image  42 , the image(形象)we have of ourselves.  43 one guy put it: “You can’t win a horse race if you think you look  44 on a horse.” To succeed, the first person you have to  45 is yourself! So stop believing your own lies about yourself. Just  46 your mind and you’ll change your life.
One of the most harmful weapons that can kill your success in life is the two little words: “47 ”. You know that people used to   48 that if human beings traveled faster than 30 miles an hour it would  49  our circulation(循环)of blood and kill us? Thank goodness a few people didn’t believe that  50 thinking, or we wouldn’t be riding in cars, buses, and flying in airplanes today. You’ll never know until you  51  .
Roger Bannister was the first human being to run a mile in less than 4 minutes. But  52 he did it, most people in the world didn’t think it was even   53  Yet only weeks after Bannister did it, suddenly  54 all over the world began running a mile in less than 4 minutes! If we believe something can be done, we’ll  55  do it.
小题1:
A.reflectsB.meansC.readsD.explains
小题2:
A.chanceB.strength C.reasonD.ability
小题3:
A.immediatelyB.properlyC.rightD.accurately
小题4:
A.ButB.BecauseC.WhatD.While
小题5:
A.challengeB.letC.admitD.help
小题6:
A.ifB.exceptC.unlessD.until
小题7:
A.quizB.questionC.mysteryD.problem
小题8:
A.AsB.WhenC.WhileD.Since
小题9:
A.curiousB.good-lookingC.funnyD.serious
小题10:
A.knockB.beatC.strikeD.defend
小题11:
A.settleB.bendC.fixD.change
小题12:
A.I failedB.Not me.C.I can’tD.Can I?
小题13:
A.thinkB.imagineC.expectD.doubt
小题14:
A.startB.helpC.closeD.stop
小题15:
A.emptyB.sillyC.reasonableD.terrible
小题16:
A.realizeB.tryC.understandD.judge
小题17:
A.beforeB.afterC.sinceD.because
小题18:
A.likelyB.unbelievableC.impossibleD.possible
小题19:
A.runnersB.workersC.competitorsD.players
小题20:
A.simplyB.seldomC.usuallyD.never