Nowadays, when people begin to think more seriously about the impact of food on health, health food becomes popular. Those powerful "healthy foods" are ironic, because it means that there are "unhealthy" foods. Health food, including natural food without artificial treatment, does not need to add chemicals to these natural foods to make the shelf life of health food longer or make the taste or appearance of health food better. Most health food lovers are vegetarians: they don't eat meat, and they prefer to eat protein from other foods, such as beans, cheese and eggs.
Fast food restaurants are now expanding rapidly in the United States, and speed is a very important factor. People usually take a lunch break because they don't want to waste time eating lunch. Fast food restaurants can usually provide places for hundreds of people to eat for a short time, where people don't have to wait. Food is very cheap, such as hamburgers and pizza shops.
Absolute interpretation, hope to adopt.