患者，女性，35岁，咳嗽1周，近2日咯血数次，每次咯血量不等，最多一次达300ml，体检左侧肺上部呼吸音减弱，患者精神紧张。

该患者突然出现咯血不畅、表情恐怖、张口瞠目、两手乱抓、大汗淋漓，进而意识突然丧失，护士应首先考虑患者发生了（）。

A.休克

B.左心衰竭

C.支气管哮喘

D.窒息

E.呼吸衰竭

_________ no doubt that a green campus plays an important role in the growth of students, both physically and mentally.

A．It is

B．There has

C．There is

D．It has