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【简答题】
5岁男孩。其患儿常出现无明显原因的皮下大片瘀斑。轻微碰伤后常出血不止,可持续数小时,乃至数。有时自发出血。患儿的父亲、叔叔也有类似现象发生。 实验室检查:凝血时间延长;血小板计数、出血时间、血块收缩正常;凝血酶原时间(PT)正常;血浆凝血因子VIII活性极低。 诊断:甲型血友病。 问题与思考: (1)为何患儿有经常出血的现象,但血小板计数、出血时间、血块收缩正常? (2)患儿有经常出血的现象与凝血时间延长、血浆凝血因子VIII活性极低有和关系? (3)患儿患有何种血液疾病?诊断依据?
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举一反三
【单选题】I would not leave my teacher in peace until she had put the crab in the ___near the well where I was confident he would be secure.
A.
trough:a long narrow open container that holds water or food for animals
B.
toy
C.
well
D.
tough
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