儿童保健服务
child health care service
Child health services
child health service
北京大学数学科学学院
department of information science
School of Mathematical Sciences
peking university
北京市环境保护监测中心；北京大学数学科学学院
beijing environmental protection monitoring centre
服务科学、管理与工程
service science
management and engineering
儿童预防保健服务
well-baby care
preventive health services for children
牙科服务需求模型
model of demand for dental services People of different occupation
牙科服务需求影响因素
Influencing factors of demand for dental services