According to a survey by the health department of a country, the incidence of cardiovascular and cerebrovascular diseases among urban residents is nearly three times that of rural residents  Some people assert that it should be due to the high-fat, high-protein, and high-calorie food intake of urban residents
Roughly speaking, the longer a person's life span, the higher the probability of suffering from a certain disease during his lifetime.
 Relatively speaking, few people in rural areas have the conditions for this kind of diseases of affluence