血型的宿命一个老是喜欢生病的人，在社会上似乎没有什么生存优势。实际上，我们也常常见到因为某些严重的疾病而早夭的人，尚未来得及传宗接代便带着他们的基因退出了生命舞台。在大自然优胜劣汰的规则下，如果没有其它的机制在起作用，生病的人应该越来越少，假以时日， The bloody fate of an old person who likes to be sick does not seem to have any survival advantage in society. In fact, we also often see people who have died of some serious illness and have not yet had time to take their genes and withdraw from the stage of life. Under the rules of nature’s survival of the fittest, if there is no other mechanism at work, sick people should be less and less, in time,