问题 单项选择题

氯氮平最严重的不良反应为()

A.粒细胞缺乏

B.心电图异常

C.脑电图异常

D.便秘

E.恶心

答案

参考答案:A

解析:氯氮平使用最大缺点是对骨髓造血功能的抑制,白细胞减少发生率约2%~3%,可进一步发展为粒细胞缺乏。粒细胞缺乏可见于治疗中的任何时候。老人、女性躯体病、同时服用其他潜在的骨髓抑制药、基础白细胞计数较低或波动较大者为高危人群。治疗早期白细胞计数常有明显波动,升高或降低,不一定是粒细胞缺乏或败血症。如白细胞降至3000/mm,或粒细胞降到1500/mm应停药。定期对血常规和白细胞分类检查有一定意义,如白细胞进行性减少或核右移应提高警惕。如患者出现发烧、咽炎等感染症状或明显疲劳而无其他原因时,应立即查血。如确诊为粒细胞缺乏,应停药并积极治疗。

阅读理解

阅读理解。

     Grown-ups are often surprised by how well they remember something they learned as children but

have never practiced ever since. A man who has not had a chance to go swimming for years can still

swim as well as ever when he gets back in the water. He can get on a bicycle after many years and still

ride away. He can play catch and hit a ball as well as his son. A mother who has not thought about the

words for years can teach her daughter the poem that begins "Twinkle, twinkle, little star" or remember

the story of Cinderella or Goldilocks and the Three Bears.

     One explanation is the law of overlearning , which can be stated as follows: Once we have learned

something, additional learning trials (尝试) increase the length of time we will remember it.

     In childhood we usually continue to practice such skills as swimming, bicycle riding, and playing

baseball long after we have learned them. We continue to listen to and remind ourselves of words such

as "Twinkle, twinkle, little star" and childhood tales such as Cinderella and Goldilocks. We not only learn

but overlearn.

     The multiplication tables (乘法口诀表) are an exception to the general rule that we forget rather

quickly the things that we learn in school, because they are another of the things we overlearn in

childhood.

     The law of overlearning explains why cramming (突击学习) for an examination, though it may result

in a passing grade, is not a satisfactory way to learn a college course. By cramming, a student may learn

the subject well enough to get by on the examination, but he is likely soon to forget almost everything he

learned. A little overlearning, on the other hand, is really necessary for one's future development.

1. What is the main idea of paragraph I?

A. People remember well what they learned in childhood.

B. Children have a better memory than grown-ups.

C. Poem reading is a good way to learn words.

D. Stories for children arc easy to remember.

2. The author explains the law of overlearning by_________.

A. presenting research findings

B. selling down general rules

C. making a comparison

D. using examples

3. According to the author, being able to use multiplication tables is_______.

A. a result of overlearning

B. a special case of cramming

C. a skill to deal with math problems

D. a basic step towards advanced studies

4. What does the word "they" in Paragraph 4 refer to?

A. Commonly accepted rules.

B. The multiplication tables.

C. Things easily forgotten.

D. School subjects.

5. What is the author's opinion on cramming?

A. It leads to failure in college exams.

B. It's helpful only in a limited way.

C. It's possible to result in poor memory.

D. It increases students' learning interest.

问答题 简答题