To establish whether grommet insertion reduces the frequency of episodes of recurrent acute otitis media and the proportion of children with symptoms of ear disease.
为了解通气管的置入，能否降低儿童反复发作急性中耳炎的频率，及耳疾症状的比率。
To determine its efficacy and safety in acute otitis media, the researchers studied 205 children with, or at high risk for persistent or recurrent disease.
为了确定左氧氟沙星对急性中耳炎的疗效和安全性，研究者研究了205名患有顽固性或再发的急性中耳炎高危性的儿童。
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