Antonio used to be afraid of dark, __________?   [ ]

A. use he            

B. did he  

C. didn't it            

D. didn't he

下列哪项对明确诊断有帮助：

A．哺乳时下腹疼加剧

B．腹部听诊肠鸣音

C．腹部X线检查

D．血常规检查

E．腹部B超声检查