单项选择题
A.切除伤口周围1~2cm的皮缘 B.伤后注射破伤风抗毒血清1500U C.在伤后6~8小时内清创 D.在伤后8~12小时内清创 E.切除伤口周围2~4cm的皮缘
A.2% B.10% C.70% D.0.5‰ E.1‰