某肺结核病人，已患病一年，因未正规治疗，故现仍有发热、咳嗽、咯血，为了解疾病情况以便对症治疗，应当作何检查 （）

A.咯血量

B.核磁共振

C.CT

D.透视

E.胸片

Ice is not often seen here in winter as the temperature normally stays           zero.

A．up

B．down

C．above

D．below