区间树上的重叠区间查找算法:通过增加树结点的信息域将红黑树扩张为区间树，并通过给定的某个区间i，查找区间树上相应的重叠区间。-The overlap interval between the tree search algorithm: tree node by increasing the information domain will be red and black tree expansion for the interval tree, and through a given inte