下列关于营养性缺铁性贫血的实验室检查叙述正确的是（）。
A.血清铁蛋白降低，血清铁降低，总结合力降低
B.血清铁降低，总铁结合力增高，铁粒幼红细胞增加
C.总铁结合力降低，血清铁降低，铁粒幼红细胞减少
D.血清铁蛋白降低，红细胞游离原卟啉增高，血清铁降低
E.红细胞游离原卟啉增高，铁幼粒红细胞增高，血清铁降低
参考答案：B
解析：营养性缺铁性贫血的实验室检查：血清铁降低，<10.7μmol/L；血清铁蛋白是诊断缺铁最灵敏的指标，放射免疫法测定<16μg/L提示缺血（正常值为18~91μg/L）；总铁结合力增高，>62.7μmol/L；骨髓细胞总数增加，幼红细胞增生活跃，以中幼、晚幼红细胞增生明显，各期红细胞均较正常小，胞浆少，染色偏蓝，白细胞系和巨核细胞一般正常；原卟啉值增高，>0.9μmol/L。故本题选B。
| Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation. About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag. |
Which of the following is TRUE about my mother
A．She enjoyed removing others’ drinks
B．She became more and more forgetful
C．She preferred to do everything by herself
D．She wanted to keep her house in good order