For some time the expert __________ people of the health risks caused by passive smoking. He     says he won’t stop until all the smokers around him decide to quit smoking.

A．is warned

B．is warning

C．has been warning

D．has been warned

女性，42岁，童年曾患麻疹，以后常有反复发作的呼吸道感染，此次发作较重，常于晨起或入夜睡觉时咳大量脓痰，来诊，查体：体温38℃，脉搏82次/分，血压14/9KPa，慢性病容，实验室检查WBC20×109/L，中性粒细胞0.85，核左移，痰液分层。

除上述临床表现外，病人还最可能出现下述哪种临床表现

A．恶心、呕吐

B．咯血

C．颈静脉怒张

D．双下肢水肿

E．呼吸困难