CONCLUSION: There exist age and gender characteristics regarding adolescent smoking behavior. The inducing factors are various, interacted with each other, and combine into a unified identity.
To study the clinical characteristics of incidence, diagnosis, therapy and complications of adolescent ovarian tumors.
探讨青少年卵巢肿瘤的发病情况，诊断和治疗特点以及并发症。
3
Objective To investigate the characteristics and changes of comfortable levels after cochlear implants(CI) in adolescents in order to obtain the basic mapping data for adolescent patients.