以毛岁以下，有3次以上急性中耳炎病史、近6个月发作超过1～2次的儿童为研究对象，排除做过增殖作切除术、放量较股导管以及对青霉江、由布青尿素过敏者。有发热或上呼吸道感染征象时，由家长常患儿到研究中心检查，有上呼吸道感染又符合下列标准者给予经合等青霉素或安格剂治 To less than three years old, there are more than 3 times the history of acute otitis media, the last 6 months more than 1 to 2 episodes of children as the research object, to exclude the proliferation of resection, volume compared to the femoral catheter and penicillin, Allergic person. Fever or signs of upper respiratory tract infection, the parents often children to the research center to check, have upper respiratory tract infection and meet the following criteria were given penicillin or Angelica