After ten hours’ operation, the doctors managed to _____the one-year-old twins at the head.

A．isolate

B．separate

C．divide

D．remove

如果疖生于头顶皮肉较薄之处，引流不畅，头皮窜空则称为

A．痈

B．有头疽

C．附骨疽

D．暑疖

E．蝼蛄疖