23. So quickly ____________ is a possibility today may be a reality tomorrow.

A．are science and teachnology advancing that

B．science and technology advancing are that

C．are science and technology advancing that what

D．science and technology advancing what that

病历摘要：患者男性，32岁。两小时前经锁骨下安置中心静脉导管，现出现呼吸困难，血压85/70mmHg，HR124次/min，脉细，听诊心音遥远，检查口唇有紫绀、颈静脉怒张。

为避免锁骨下穿刺发生气胸，应注意（）

A.进针点应尽量靠外

B.针尖尽量指向胸骨上窝

C.穿刺针尽量贴近锁骨后缘

D.进针点尽量靠内

E.针尖指向甲状软骨