This question discusses which types of places should be noise-free. In responding, one can consider places that require a quiet environment, such as libraries, hospitals, classrooms, etc., and why these places need to be kept quiet. The importance of a quiet environment for focus, relaxation, and health can be discussed.

这个问题探讨了哪些类型的地方应该是无噪音的。在回答时，可以考虑那些需要安静环境的场所，如图书馆、医院、教室等，以及为什么这些地方需要保持安静。可以讨论安静环境对于专注、放松和健康的重要性。