The doctor must have sat up all night with his patient, __ you see, he looks tired and sleepy.

A．as

B．which

C．for

D．because

36岁，女性，幼年即患糖尿病需要胰岛素维持治疗，患者近来血压升高需给予抗高血压治疗，可选择下列哪种药物（）

A.卡托普利

B.氢氯噻嗪

C.普萘洛尔

D.二氮嗪

E.以上均不可用