6．Washing machines made by China have won           worldwide attention and Haier has become            popular name.

A．a; the

B．/; a

C．/; the

D．the; a

患者2周前，因龋坏去医院做后牙复面洞银汞合金充填。术后一直有咬物酸痛。查见患牙充填体上有一亮点，叩诊轻度不适。医师首选的治疗是

A．去充填物作检查

B．去充填体再充填

C．去充填体高点观察

D．去充填体做安抚

E．麻醉下牙髓治疗