某野生动物保护区，为了使鹿群不受狼的惊扰和残害，便组织了打狼队。几年过后，狼的踪影不见了，鹿却纷纷得了心血管病、肥胖证。因为鹿没有了天敌，生活平静，不再奔命，运动量减少，导致了体质下降。后来引狼入“室”，鹿群又恢复了生机，而且繁殖力大大提高。由此联想到，? A wildlife sanctuary, in order to make the herd from wolves disturbing and mutilation, they organized a fight wolves. A few years later, the disappearance of the wolf disappeared, but deer have cardiovascular disease, obesity card. Because the deer has no natural enemies, life is calm, no longer dying, exercise less, leading to physical decline. Later wolf into the “room”, deer group has resumed its vitality, and fertility greatly increased. So think of it,?