2.ear drops (1 pre-rupture, 2%phenol glycerine (2after rupture, antibiotics solution such as 0. 25%chloromycetin solution 0.3%ofloxacin solution 2.ear drops:  ① pre-rupture, 2%phenol glycerine;  ②after rupture, antibiotics solution such as :  0.25%chloromycetin solution,  0.3%ofloxacin solution