目的探讨广州地区婴幼儿非细菌性下呼吸道感染病原学特征。
Objective to investigate the nonbacterial etiology of children's acute lower respiratory infection in Guangzhou.
目的：评价头孢丙烯治疗急性细菌性下呼吸道感染的临床有效性、安全性。
AIM: to evaluate the clinical efficacy, safety of cefprozil in treating acute bacterial lower respiratory tract infection.
目的：评价阿奇霉素注射剂治疗急性细菌性下呼吸道感染的有效性和安全性。
Objective: to evaluate the efficacy and safety of azithromycin injection in the treatment of acute bacterial infections of lower respiratory tract.
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