一新生儿胎龄252d，娩出经过顺利。生后8h因呼吸急促2h伴唇周青紫住院。体检：呼吸每分钟60次，轻度吸气性凹陷，两肺粗啰音，胸骨左缘第2肋间Ⅰ～Ⅱ级收缩期杂音，心率每分钟140次，律齐。入院后头罩吸氧（FiO₂0.6），测血pH及血气分析：pH：7.32，PaO₂：6.4kPa，PaCO₂：6.7kPa，BE：6mmoL/L。胸部X线片：两侧肺野匀称，肺纹理增多，右侧叶间胸膜积液，横膈顶部分压低变平。

为初步诊断，应先做哪一项检查（）

A.血气分析

B.胸部X线检查

C.血常规

D.心脏超声检查

E.查卵磷脂/鞘磷脂（L/S）比值

George loves pop music very much but ________ classical music.

A．pokes his nose into

B．has a good nose for

C．puts his nose in

D．turns his nose up at