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患者男性，70岁。腰背部疼痛半年前来就诊，体检：肝肋下2cm，脾肋下3cm，多个腰椎骨压痛明显。实验室检查：Hb85g／L，WBC4.6×109／L，PLT110×109／L，ESR120mm／h，尿蛋白定性（-），24小时尿蛋白定量5g。BUN15mmol／L，总蛋白90g／L，白蛋白15g／L，球蛋白75g／L，IgG32g／L，IgA3.6g／L。

外周血涂片可发现（）。

A.泪滴样红细胞

B.棘形红细胞

C.靶形红细胞

D.缗钱样红细胞

E.点彩红细胞

答案

参考答案：D

解析：

1.白血病患者骨髓增生明显或极度活跃，原始细胞和幼稚细胞占30%～80%，而较成熟的中间阶段细胞缺如，仅残留少量成熟粒细胞，形成所谓白血病"裂孔"现象。

2.巨幼细胞性贫血骨髓的典型特征：骨髓增生明显或极度活跃，以不同发育阶段红细胞增生为主；粒／红比值降低；各系细胞巨幼变，分裂象易见；细胞核发育落后于细胞浆。

单项选择题

So long as teachers fail to distinguish(differ) between teaching and learning, they will continue to undertake to do for children that which only children can do for themselves. Teaching children to read is not passing reading on to them. It is certainly not endless hours spent in activities about reading. Douglas insists that "reading cannot be taught directly and schools should stop trying to do the impossible".
Teaching and learning are two entirely different processes. They differ in kind and function. The function of teaching is to create the conditions and the climate that will make it possible for children to plan cleverly the most efficient system for teaching themselves to read. Teaching is also a public activity: It can be seen and observed.
Learning to read involves all that each individual does to understand the world of printed language. Almost all of it is private, for learning is an occupation of the mind, and that process is not open to public scrutiny.
If teacher and learner roles are not interchangeable, what then can be done through teaching that will aid the child in the long search for knowledge Smith has one principle rule for all teaching instructions. "Make learning to read easy, which means making reading a meaningful, enjoyable and frequent experience for children. "
When the roles of teacher and learner are seen for what they are, and when both teacher and learner fulfill them properly, then much of the pressure and feeling of failure for both is got rid of. Learning to read is made easier when teachers create an environment where children are given the chance to solve the problem of learning to read by learning.

The word "scrutiny" (Paragraph 3) most probably means "______".

A. unbelief



B. control
C. inquiry



D. observation
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问答题 简答题

对比论述土壤空气与大气的特点。
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