(2013·湖南高考)You cannot accept an opinion ______ to you unless it is based on facts.

A．offering

B．to offer

C．having offered

D．offered

10岁男孩。因阵发性右上腹腹痛2天收治入院。既往有排蛔虫史。入院诊断考虑胆道蛔虫症。问胆道蛔虫症的临床特点是( )

A．腹痛伴发热及黄疸
B．腹痛症状及体征明显
C．腹痛症状严重而体征少
D．腹痛症状与体征均较轻微
E．腹痛伴黄疸及腹部包块