第二节改错 （10 分）

Fang Tong is 34 years old, an actor, director and teacher of Beijing Opera Theatre. Most of her students are from other part of China and have come to Beijing at a very young age of sixteen or seventeen. He hopes create an environment for his students that it is much more relaxing than the one he used to study in. He thought that an actor should relax himself when performing. Yet his students deep respect him and he never needs to raise his voice in order to be hearing. For his opinion, actors should go on even when they feel they have made a mistake in their performances because the moment is already gone but people can never be back to it. So art is always changing and developing.

高位肛瘘最宜选用的手术方法是：

A．切开法
B．挂线法
C．结扎法
D．垫棉法
E．引流法