-How does Nina get to school?

-__________, she walks to the bus stop. __________ she takes a bus to the bus stop near the school. Finally, she walks to school.[ ]

A. First; Then

B. Then; Next

C. Next; Then

D. First; Last

男性，7岁，6小时前由货车上跌下，伤后即有呼吸困难，并逐渐加重。入院查体：脉搏130次／分，血压10.7/6.7kPa，呼吸22次／分，颜面发绀，吸气性呼吸困难，颈上胸部有皮下气肿，气管向左移位，右侧呼吸音消失。

其诊断首先考虑为（）

A.多根多处肋骨骨折

B.血胸

C.开放性气胸

D.血心包

E.张力性气胸