The manager, ________to know the fact, left the room quietly.

A．who is surprised

B．having been made

C．being surprised

D．surprised

肺心病急性加重期的治疗关键是( )

A．低流量吸氧
B．利用呼吸机改善呼吸功能
C．强心、利尿
D．积极控制感染、解除支气管痉挛、改善通气功能
E．快速建立静脉通路，补液