唐人刘希夷有诗说:“年年岁岁花相似,岁岁年年人不同。”他的意思是,随着岁月的流逝和年龄的增长,每个人的外表都要发生变化和走向老迈。然而,由于人类医疗技术的迅猛发展,对疾病的认识和防范意识的提高,生活水平和自我保健意识的加强,人类的寿命得到了普 Liu Xi-yi from the Tang Dynasty said: “The flowers are similar in every age, and the age is different from person to person.” "What he means is that as the years go by and the age increases, everyone’s appearance changes and moves toward the old . However, due to the rapid development of human medical technology, the awareness of diseases and the rise of prevention awareness, the improvement of living standards and self-care awareness, the life expectancy of human beings