这个节日期间，市中心区域被严密巡逻以保障安全。

The city center was strictly ___policed during the festival to ensure safety.

商场保安严格管理着装规定，禁止穿拖鞋入内。

The mall security strictly ___policed the dress code, prohibiting slippers from being worn inside.

志愿者在公园维持游客秩序。

Volunteers ___policed the park to maintain order among visitors.