并对地铁突发事件应对体系的预防应对子系统、紧急应对子系统、事后恢复子系统进行了详细阐述。最后，提出了今后需深一步探索和研究的方向。
This paper, based on the characteristics of the metro emergencies in the world, designs a frame of countermeasures against metro events and makes a further study on the details of this framework.
有效的控制措施依靠预防、防备和应对活动。
Effective control measures rely on prevention, preparedness and response.
什么样的健康问题影响着青少年，怎样预防和应对它们？
Which health problems affect adolescents and what can be done to prevent and respond to them?
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