现代社会由于经济危机、失业率增加等原因,干预各国的自杀率呈逐年上升趋势,自杀已成为一个公共卫生问题。在许多国家,自杀已成为居民前10位死因之一,美国每2 h有1名青少年自杀,2003年青少年因自杀导致的死亡人数超过艾滋病、肿瘤、心肺疾患、出生缺陷的总和[1]。在我国,自杀是 Due to the economic crisis and the increase of unemployment rate in modern society, the suicide rate of each country intervened has been increasing year by year. Suicide has become a public health issue. In many countries, suicide has become one of the top 10 causes of death among residents. In the United States, one adolescent commits suicide every 2 hours. In 2003, adolescents committed suicide more than AIDS, cancer, cardiopulmonary diseases and birth defects. [1] In our country, suicide is