On the one hand,there're lots of skyscrapers in big cities. Life there is more convenient, and people can enjoy various forms of entertainment.Education is better in big cities because there are plenty of excellent teachers and advanced teaching equipments,which is beneficial to the future of children. But just as the saying goes,"Every advantage has its disadvantage"； big cities have their own disadvantages. For example ,big cities are crowded and noisy,and living space is limited. On the other hand,small towns have their own advantages. For example,life is quieter,and interpersonal relations are easier to deal with. So they are more suitable for old people to live in?

I think great importance should be attached to the modernization and humanization of cities since there'll be more and more city dwellers in the world,and habitability of cities should become people's priority.

First of all,I'll talk about its advantages. In the countryside,the air is clean, the food is fresh,and houses are usually spacious. People are close to nature. Most of all,country people are simple and kind. However,just as the saying goes,"No garden is without weeds"; living in the countryside has its own disadvantages.For example,rural life is dull and monotonous, transportation is not convenient,and markets aren't so advanced. And the biggest disadvantage lies in education. Children in the countryside don't have access to high-quality education which results in their narrow horizons.