1.When answering this question, you can compare the variety, scale, and quality of public facilities in big cities versus small cities. Big cities often have more diverse and advanced public facilities due to higher population density and greater financial resources. For example, big cities may have extensive public transportation networks, large hospitals, and numerous recreational facilities. 2.On the other hand, small cities might have fewer public facilities, but they can be more community-oriented and easier to access. You can also discuss how the needs and lifestyles of residents in big and small cities influence the types of public facilities available.