问题 单项选择题

脑脊液静置12~24小时后,标本表面有纤细网膜形成,常见于下列何种疾病。()

A.化脓性脑膜炎

B.结核性脑膜炎

C.蛛网膜下腔梗阻

D.流行性乙型脑炎

E.脑脊髓梅毒

答案

参考答案:B

解析:

正常脑脊液放置12~24h后不会形成薄膜、凝块或沉淀,脑脊液形成凝块或薄膜与其所含的蛋白质,特别是与纤维蛋白原的含量有关,当脑脊液蛋白质含量超过10g/L时,可出现薄膜、凝块或沉淀。结核性脑膜炎的脑脊液在12~24h内呈薄膜或纤细的凝块。化脓性脑膜炎的脑脊液在1~2h内呈块状凝固。

单项选择题
单项选择题

I’ve recently turned fifty, which is young for a tree, midlife for an elephant, and ancient for a sportsman. Fifty is a nice number for the states in the US or for a national speed limit but it is not a number that I was prepared to have hung on me. Fifty is supposed to be my father’s age, but now I am stuck with this number and everything it means.
A few days ago, a friend tried to cheer me up by saying, "Fifty is what forty used to be. "He had made an inspirational point: Am I over the hill People keep telling me that the hill has been moved, and I keep telling them that the high-jump bar has dropped from the six feet I once easily cleared to the four feet that is impossible for me now.
"Your are not getting older, you are getting better," says Dr. Joyce Brothers. This, however, is the kind of doctor who inspires a second opinion.
And so, as I approach the day when I cannot even jump over the tennis net, I am moved to share some thoughts on aging with you. I am moved to show how aging feels to me physically and mentally. Getting older, of course, is obviously a better change than the one that brings you eulogies (颂词,悼词). In fact, a poet named Robert Browning considered it the best change of all:
Grow old along with me!
The best is yet to me.
Whether or not Browning was right, most of my first fifty years have been golden ones, so I will settle for what is ahead being as good as what has gone by. I find myself moving toward what is ahead with a curious blend (混合) of both fighting and accepting my aging, hoping that the philosopher(哲学家) was right when he said, "Old is always fifteen years from now. \

The author seems to tell us in Paragraph I that ______.

A.time alone will tell

B.time goes by quickly

C.time will show what is right

D.time makes one forget the past