The physician inserts a chest tube into a client to treat a pneumothorax. The tube is connected to water-seal drainage. The nurse can prevent chest tube air leaks by

A. keeping the chest drainage system below the level of the chest.
B. keeping the head of the bed slightly elevated.
C. checking and taping all connections.
D. checking patency of the chest tub

（2004年）

甲国人艾某在甲国打工时因不满雇主詹某，炸毁了詹某的厂房和住所，逃至乙国。艾某的行为根据甲国刑法，有可能被判处死刑。甲乙两国之间没有任何涉及刑事司法协助方面的双边或多边条约。基于以上情况，根据国际法，下列判断何者为正确？

A．如甲国向乙国提出引渡请求，则乙国有义务将艾某引渡给甲国

B．如艾某向乙国提出庇护请求，则乙国有义务对艾某进行庇护

C．乙国可以既不对艾某进行庇护，也不将其引渡给甲国

D．甲国可以在乙国法院对艾某提起刑事诉讼