男性，68岁，反复咳喘20余年，加重4天，嗜睡1天来院。查体：嗜睡，球结膜水肿，皮肤湿暖红润，口唇发绀，BP170/90mmHg（22.7/12kPa），R30次/分，脉搏118次/分，双肺可闻干湿性啰音，双侧腱反射减弱，双下肢可凹性水肿。

其神志障碍的最可能原因为（）

A.脑血管意外

B.严重低钠血症

C.中枢神经系统感染

D.CO₂潴留引起的肺性脑病

E.感染中毒性脑病

根据句意, 用所给单词的适当形式填空

1. My father and my uncles are all __________(policeman).            

2. That is the __________(begin) of the garden tour.                      

3. Are the doctors and nurses in the hospital __________(friend) to you?  

4. The koalas often sleep during the day and eat __________(leaf) at night.

5. Mary enjoys __________(watch) soccer games very much.