术后尿潴留的首选处理方法是：（）
A.导尿留置尿管
B.下腹部热敷
C.针刺疗法
D.给镇痛药
E.氨甲酰胆碱肌内注射
参考答案：B
He _________ his homework at school. [ ]
A. doesn't do
B. don't does
C. isn't do
D. does not
双焦眼镜近用区前顶焦度处方为：-2.12-1.50×180，远用区前顶焦度处方为：-4.37-1.50×180，则眼镜的近附加光度为（）D。
A、+2.12
B、+2.25
C、+2.37
D、+2.50
