--- I feel tired and sleepy.

--- Why not stop ______?

A．relaxing

B．to relax

C．resting

D．to work

支气管胸膜瘘的常见症状有（）

A.咳嗽、咳痰

B.胸闷、呼吸困难

C.咯血

D.全身感染中毒症状

E.胸痛