知识范文

　　From the chart we can see that during the past five years there have been great changes in peoples diet. The greatest change occurs in grain consumption, which has dropped 4% from 49% in 1986 to 45% in 1990 in total food consumption. The second greatest change is in milk consumption, which increased from 10% in 1986 to 13% in 1990. But on the other hand, two trends can be observed in the consumption of meat and fruit and vegetables. From 1986 to 1989, meat consumption increased from 17% to 23% while that of fruit and vegetables dropped from 24% to 20%. From 1989 to 1990, meat consumption dropped a little to 21%, while that of fruit and vegetables increased a little to 21%.

　　What has caused the great changes in peoples diet? The main reason, I think, lies in the improvement in peoples income level. With the development of our society, people are becoming richer and richer, which enables them to purchase more nutritious food such as meat and milk. In the meantime, grain consumption in peoples diet consequently dropped. 　　So from the analysis, we can draw a conclusion that our society is progressing and people are living a better life than ever before. We are now able to purchase more delicious and nutritious food, resulting in an improvement in our health.