腹部外伤合并出血性休克，主要的处理原则是（）
A.立即手术止血
B.须在休克好转后再进行手术
C.已发生休克要积极抢救，力争在收缩压回升至llkPa以上后进行手术
D.给予大量镇静剂止痛
E.空腔脏器破裂不必用大量抗生素
参考答案：C
解析：该病人有腹部外伤、出血、休克，处理时应先抗休克（补充血容量），力争使血压回升，使收缩压升至11kPa以上后，积极进行手术处理出血和外伤的修复。
| The sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The sun has existed in its present state for about 4 billion, 600 million years and is thousands of times larger than the Earth. By studying other stars, astronomers can predict what the rest of the sun’s life will be like. About 5 billion years from now, the core of the sun will shrink and become hotter. The surface temperature will fail. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the sun will expand approximately 35 million miles, about the distance to mercury, which is the closest planet to the sun. The sun will then be a red giant star. Temperatures on the earth will become too hot for life to exist. Once the sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the earth, it will become a white dwarf star. The sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf. After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the earth will be dark and cold. If any atmosphere remains there, it will have frozen onto the earth’s surface. |
It can be inferred from the passage that the sun ______ .
A．is approximately halfway through its life as a yellow dwarf
B．has been in existence for 10 billion years
C．is rapidly changing in size and brightness
D．will continue as a yellow dwarf for another 10 billion years