—How are you doing so well in surfing, Tony? 

—______. [ ]

A. Best wishes

B. More or less

C. On display

D. With my uncle's help

腹外疝最主要的发病因素是

A．慢性咳嗽
B．长期便秘
C．排尿困难
D．腹壁有薄弱点或腹壁缺损
E．经常从事腹内压增高的工作