随着经济发展、医疗技术的进步和社会组织的完善，人群出生率、生育率的下降，传染病的发病率和死亡率显著的下降，慢性病、性传播疾病和意外伤害逐渐成为危害人类健康的主要卫生问题；这些疾病的发生、发展和预后都与人群的一些行为危险因素密切相关，所以要预防这些疾病... With the development of economy, advancement of medical technology and improvement of social organizations, the decline in birth rate and fertility rate of the population, the incidence of communicable diseases and death rates have decreased significantly, and chronic diseases, sexually transmitted diseases and accidental injuries have gradually become the main hazards to human health. Health problems; the occurrence, development and prognosis of these diseases are closely related to some of the behavioral risk factors in the population, so we must prevent these diseases...