外科哪些手术可预防性使用抗菌药物？

患者，女，36岁。起病急骤，壮热口渴，头痛烦躁，恶心呕吐，大便频频，痢下鲜紫脓血，腹痛剧烈，里急后重，舌质红绛，舌苔黄燥，脉滑数。其诊断是（）

A.湿热痢

B.疫毒痢

C.寒湿痢

D.虚寒痢

E.休息痢

男，32岁，A型血友病患者，因外伤后反复左大腿肿胀4年，左大腿皮肤溃疡4个月入院。入院体查：左大腿皮肤可见瘀斑，左大腿极度肿胀，局部皮温增高，左大腿内侧可见一5cm×5cm左右皮肤破溃，内可探及3cm深窦道，有红色黏稠状分泌物流出，有异味。

检查发现该患者左股骨颈及股骨干骨质破坏，有死骨形成，骨质破坏的原因是（）。

A.感染

B.出凝血机制障碍

C.血友病继发骨病

D.骨质疏松

E.多发性骨髓瘤

The surprising experiment I am about to describe proves that air is all around you and that it presses down upon you. Air pressure is a powerful force. When you swim underwater, you can feel water pushing down on your body. The air all around you does the same. However, your body is so used to it that you do not notice this. The pressure is caused by a layer of air called the atmosphere. This layer surrounds the Earth, extending to about five kilometers above the Earth’s surface.

The following experiment is an easy one that you can do at home. But make sure that you are supervised, because you will need to use matches. Now for the experiment！

What you need

•A hard-boiled egg without the shell

•A bottle with a neck slightly smaller than the egg

•A piece of paper

•A match

Method

1） Check that the egg will sit firmly on the neck of the bottle.

2） Tear the paper into strips and put the strips into the bottle.

3） Light the paper by dropping a burning match into the bottle.

4） Quickly sit the egg on the neck of the bottle.

Result

Astonishingly, the egg will be sucked into the bottle. Your friends will be amazed when you show them the experiment. But be careful when you handle matches.

Why it happened

As the paper burns, it needs oxygen and uses up the oxygen （air） in the bottle. The egg acts as a seal in the neck of the bottle, so no more air can get inside. This reduces the air pressure inside the bottle. The air pressure must equalize, so more air from outside must enter the bottle. The outside air pressure against the egg and then the egg is pushed into the bottle! This proves that air is all around and that it is pressing down on it.

小题1:Why is there the need to take care when you are doing the experiment?

A．The bottle could break.

B．You need to light the paper with a match.

C．The egg needs to be shelled.

D．The egg has to be perfectly placed on the neck of the bottle.小题2:In the experiment, the burning inside the bottle can___.

A．equalize the air pressure inside and outside

B．make a seal in the neck of the bottle

C．finish up the oxygen inside the bottle

D．produce more oxygen inside the bottle小题3:How did the egg put into the bottle？

A．The oxygen inside the bottle sucked the egg in.

B．It became saft without the shell.

C．The neck of the bottle was wide enough.

D．The outside air pressure forced it into the bottle.小题4:The experiment is carried cut to prove ______.

A．water pushes on your body when you swim underwater.

B．the earth is surrounded by a layer of air called the atmosphere.

C．the pressure of air around us has a powerful force.

D．the air pressure is not equalized around us.

特约商户没收卡后，应该如何处理（）.

A、使用POS购物单向持卡人开具一份没收卡的收据，一式三份，注明卡号没收原因，商户持卡人和受单机构各保留一份；

B、致电中国银联分公司，和受单银行；

C、没收卡后当场进行剪角处理

D、没收卡次日起的3个交易日内通知受单机构，并对未按照要求处理产生的风险承担责任。

能否实施有效的城市规划管理，必须熟悉行政效能知识和掌握捉高行政效能方法。对城市规划管理来说，在行政效能中尤其要注重提高：

A．管理效益
B．管理效率
C．管理效能
D．管理质量