据德国解剖学家赫伯特豪格对160名20至111岁死者的大脑进行研究的结果表明,大脑神经细胞几乎并不随着年龄的增长而衰亡,只是细胞的体积缩小了.但这种缩小一般在60岁以后才开始,90岁以前只缩小7～8％.由此看来,45至65岁的人正处于生理上的中年阶段。当孔子在说“三十而立”的时候,当时社会的人均寿命只有20岁。1989年在伦敦举行的一次会议上,许多学者认为,人到50岁,工 According to Herbert Haug, a German anatomist, who studied the brains of 160 deceased between the ages of 20 and 111 years, neuronal cells almost did not decay with age, but the size of the cells was reduced. However, Generally, it starts after the age of 60 and only decreases by 7 to 8% before the age of 90. From this, people aged 45 to 65 are in middle-aged physiology. When Confucius said that “when he was thirty”, the average life expectancy of the people in that time was only 20 years. At a conference held in London in 1989, many scholars believed that when people reach the age of 50, they work