Application of fever risk score in children aged 3 months to 5 years having acute fever without obvious infection focus　ZHU Yidong¹, ZHOU Jianfeng², CHAI Jiannong¹, XU Yongmei¹, XIA Xiaohong¹ (1.Department of Pediatrics, Changshu No.1 People's Hospital, Changshu 215500, Jiangsu, China; 2.Changshu Traditional Chinese Medical Hospital, Changshu 215500, Jiangsu, China)