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选择７９５例因呼吸道感染接受抗生素治疗的患儿作为观察对象，年龄６个月～５９个月。随机分为两组，分别接受阿莫西林９０mg／（kg·d）５日（３９８例）或４０mg／（kg·d）１０日（３９７例）治疗，均为每日１次～２次。分别于开始治疗前及治疗后第五、十及二十八日行鼻咽
A total of 795 children aged 6 months to 59 months who were treated with antibiotics for respiratory infections were selected as the observation subjects. The patients were randomly divided into two groups and received amoxicillin 90 mg / (kg · d) for 5 days (398 cases) or 40 mg / (kg · d) for 10 days (397 cases) respectively. All patients were treated once or twice daily. Nasopharyngeal was performed on the fifth, tenth and 28th days before treatment and after treatment respectively