Due to circumstances ________ our control, the performance has to be canceled.

A．beyond

B．with

C．within

D．under

某男，18岁。因高热，胸痛，咯铁锈色痰入院，检查：急性热病病容，体温40℃，脉搏102次/分，X线胸片示左上肺大片片状阴影，白细胞19×10⁹/L。治疗应首选

A．青霉素
B．环丙沙星
C．糖皮质激素
D．红霉素加庆大霉素
E．病毒唑