在以British and American English为主题的课堂前面列出以下四条名人语录，组织学生进行讨论。
(a) We have really everything in common with America nowadays except, of course, language.
(b) Within a century British and America English speakers will not be able to understand each other.
(c) America and English are two countries divided by a common language.
(d) It doesn’t make much of a difference whether a teacher speaks British or America English.
试对以上案例进行分析。

40岁男性，2周前扭腰后感腰部剧痛，咳嗽加剧，右下肢发麻。体查：L4～5椎间隙压痛，直腿抬高试验右侧30°（+），加强试验（+），右小腿外侧感觉迟钝，腱反射正常。首选治疗为（）。

A.卧床休息，骨盆牵引+理疗

B.单纯卧床休息

C.单纯口服止痛药

D.手术摘除椎间盘

E.加强腰肌锻炼