Operation Room Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China;
Postgraduate Class Tongji Medical College Huazhong University of Science and Technology Wuhan China;
Operation Room Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China;
Operation Room Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China;
Anesthesiology Department Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China;
Anxiety; Child; Game and playthings; Preoperative care; Preschool;