实行分区差异化管理政策，由一道防控外溢防线变为两道防线，有望实现关口前移，压缩疫情外溢风险，以最小社会影响、最低社会成本实现疫情防控最大成效。
The implementation of the policy of zoning and differentiated management is to make one defense line of the spread of prevention and control into two lines, make it possible to move the gateway forward, reduce the risk of the spread of the epidemic, and to achieve the maximum effectiveness of epidemic prevention and control with the minimum social impact and social cost.