【正确答案】As we see from the table, great changes have been taking place in people's diet over the period from 1997 to 2003. The consumption of grain has decreased by 7%, while the consumption of high quality food, such as milk and meat, has increased steadily.
There are chiefly two reasons, in my opinion, for the changes. In the old days, people could not often afford meat and milk whose price was only within the reach of well-to-do families. But now, with the improvement of living standard, most people have enough money to buy them. And people of today also pay more attention to nutrition. They want to eat not only more but also better. They are seeking the most reasonable diet structure which will do good to their health.