问题 单项选择题

下列关于急性淋巴细胞白血病(ALL)的叙述,错误的是

A.白血病细胞有明显的质和量异常

B.白血病细胞PAS染色可呈阳性反应

C.白血病细胞易浸润肝、脾和淋巴结

D.白血病细胞胞浆中可见Auer小体

E.白血病细胞可进入周围血液

答案

参考答案:D

解析: 急性淋巴细胞白血病中,白血病细胞形态异常,胞核和胞质有明显的质和量的异常。白血病细胞PAS染色约20%~80%的原淋巴细胞呈阳性反应。退化细胞明显增多,篮细胞多见,这是急淋的特征之一;而胞质内出现Auer小体有助于急性髓细胞白血病的诊断。血象中可见原始及幼稚淋巴细胞增多。临床上起病多急骤,发热、中至重度贫血、皮肤黏膜及内脏出血,全身淋巴结无痛性肿大,轻、中度肝脾肿大较其他白血病为多见,骨关节疼痛及胸骨压痛较明显,并发中枢神经系统白血病的发病率较高。

单项选择题
单项选择题

Lying in the sun on a rock, the cougar saw Jeb and his son, Tom, before they saw it. Jeb put his bag down quickly and pulled his jacket open with both hands, making himself look big to the cougar. It worked. The cougar hesitated, ready to attack Jeb, but ready to forget the whole thing, too.
Jeb took off his jacket, grasped Tom and held him across his body, making a cross. Now the cougar’s enemy looked even bigger, and it rose up, ready to move away, but unfortunately Tom got scared and struggled free of Jeb.
"Tom, No!" shouted his father.
But Tom broke and ran and that’s the last thing you do with a cougar. The second Tom broke free, Jeb threw himself on the cougar, just as it jumped from the rock. They hit each other in mid air and both fell. The cougar was on Jeb in a flash, forgetting about Tom, which was what Jeb wanted. Cougars are not as big as most people think and a determined man stands a chance, even just with his fists. As the cougar’s claws got into his left shoulder, Jeb swung his fist at its eyes and hit hard. The animal howled (吼叫) and put its head back. Jeb followed up with his other fist. Then out of the comer of his eye, Jeb saw Tom. The boy was running back to help his father.
"Knife, Tom," shouted Jeb.
The boy ran to his father’s bag, while Jeb started shouting as well as hitting, to keep the cougar’s attention away from Tom. Tom got the knife and ran over to Jeb. The cougar was moving its head in and out, trying to find a way through the wall. Jeb was making out of his arms. Tom swung with the knife, into the cougar’s back. It howled horribly and ran off into the mountains.

How did Jeb try to hold the cougar’s attention

A.By keeping shouting and hitting.

B.By making a wall out of his arms.

C.By throwing himself on the cougar.

D.By swinging his fists at the cougar’s eyes.