监狱“三防”（防罪犯脱逃、防非正常死亡、防重大恶性案件）工作是一项长期的艰巨的任务。它关系到监狱的安全稳定，也关系到社会政治的稳定。今年以来，司活部高昌礼部长反复强调了“两个不允许、一个压缩”的基本要求和工作指标，为监狱工作指明了努力的方向。监狱是执行刑? The work of prison “three defenses” (preventing offenders from committing crimes, preventing non-normal deaths and preventing major and serious crimes) is a long-term and arduous task. It relates to the security and stability of the prison, but also to the social and political stability. Since the beginning of this year, the Minister of Justice, Ministry of Living and Welfare Minister Gao Changli has repeatedly emphasized the basic requirements and work targets of “two disallows and one compression” and pointed out the direction of efforts for prison work. Prison is the execution of punishment?