随机生成一颗有一千个节点的区间树和一个区间，程序返回树的高度和根节点信息，同时给出与给定区间重叠的节点和具有最小低端点的重叠节点-There are a range of randomly generated tree node and a thousand range, the program returns to the tree height and root information, and gives the given interval overlapping nodes and nodes with minimal overlap the low end point