[单选题]女性、肛周脓肿切开引流术后第一天
A.1：5000 高锰酸钾液坐浴
B.禁食、保持胃肠减压通畅
C.肛管排气
D.清洁灌肠、清除肠道粪便

B
Unless we spend money spotting and preventing asteroids now, one might crash into Earth and destroy life as we know, say some scientists.
Asteroids are different forms of the meteoroids that race across the night sky. Most orbits the sun far from Earth and don’t threaten us. But there are also thousands of asteroids whose orbits put them on a violent coming course together with Earth.
Buy $ 50 million worth of new telescopes right now. Then spend $10 mil]ion a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we’ll have a way to change its course.
Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn’t be cheap.
Is it worth it Two things experts consider when judging any risk are: 1) How likely the event is; and 2) How bad the consequences if the event occurs. Experts think asteroids big enough to destroy lots o
A. It sounds practical but it may not solve the problem.
B. Further research should be done before it is proved to be capable.
C. It may create more problems than it might solve.
D. It is a waste of money because a violent coming course of asteroids with the earth is very. unlikely.

Everyone has heard of the San Andreas fault, which constantly threatens California and the West Coast with earth- quakes. But how many people know about the equally serious New Madrid fault in Missouri.’
Between December of 1811 and February of 1812, three major earthquakes occurred, all centered around the town of New Madrid, Missouri, on the Mississippi River. Property damage was severe.
Buildings in the area were almost dest oyed. Whole forests fell at once, and huge cracks opened in the ground, allowing smell of sulfur to filter upward.
The Mississippi River itself completely changed character, developing sudden rapids and whirlpools. Several times it changed its course, and once, according to some observers, it actually appeared to run backwards. Few people were killed in the New Madrid earthquakes, probably simply because few people lived in the area in 1811; but the severity of the earth- quakes are shown by the fact that the shock waves rang
A. greatly
B. extremely
C. basically
D. necessarily