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一、要正确认识人口老龄化的严峻挑战 讲老年学研究，就必须讲人口老龄化，这是因为，老年学这门新兴科学是随着人口老龄化应运而生的。 人口老龄化是一个全球性的社会现象。我们可以这样说，２０世纪是人口老龄化的起步阶段，２１世纪则是人口老龄化的加速阶段。据联合国统计
First, to correctly understand the serious challenge of aging population, we must address the problem of population aging. This is because the emerging science of geriatrics came into being as the population ages. Population aging is a global social phenomenon. We can say that the 20th century is the initial stage of population aging and the 21st century is the accelerated stage of population aging. According to UN statistics