【答案解析】With the rapid development of our social economy, the enhancement of people"s living standard, and the improvement of medical treatment, the number of population of old people has increased evidently. Many people are anxious of it, but a man of insight indicate that we not only set eyes on the huge pressure caused by old people, but also understand the merchant opportunities implicationly behind it, along with old people"s abundant brains, experience, and the like. We need turn pressure into opportunity.