呱呱坠地的婴儿,绝大部分都是健康的。青少年个体间体格上的差距加大,然而,大部分人仍是健康的。真正的差别是在30岁以后,有的人未老先衰,有的人整日缠绵病榻,更有少数人过早地夭亡。身体在盛年时就出现这么大的不同并不是偶然的,而是有着先天和后天的必然性。先天遗传造成的差距自己力不能及,但是一般而言,遗传对寿命的影响仅占30％左右,换言之,一个人的健康长寿有70％以上是可以掌握在自己手里的,先天不足可以后天补。而后天是否补得起来,就得看人在后天养成的某些习惯,因为坏习惯可能成 The birth of a baby, most of them are healthy. Physical differences among adolescents have increased, however, most of them are still healthy. The real difference is that after the age of 30, some people have not aged first, others have been sick all the day, and a few have prematurely died. It is no accident that such a big difference in physical appearance during the height of the year, but with the inherent and acquired inevitability. Genetic causes of the gap caused by their own powerless, but in general, the impact of genetic on life expectancy only about 30%, in other words, a person’s health and longevity of more than 70% can be in their own hands, congenital to Acquired . If the acquired day is up, we must look at some of the habits that people develop in the day after tomorrow, because bad habits may become