接着在理论研究基础上把感知利得与感知风险一并纳入研究框架，从感知风险构面、感知风险影响因素及减少风险行为三个方面进行研究。
The influence factors of the perceived risk, the composing of the consumer perceived risk and the reducing risk behavior are analyzed after theory analyzing.
任何新的预防方法必须不损害减少HIV传播风险的现有保护行为和预防战略。
Any new prevention modality must not undermine existing protective behaviours and prevention strategies that reduce the risk of HIV transmission.
在许多国家，法律以及社会和文化壁垒妨碍风险群体获得必要的干预措施和知识以减少有害行为。
In many countries, legal as well as social and cultural barriers prevent groups at risk from receiving the interventions and knowledge needed to reduce harmful behaviours.
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