倍珍惜每刻青春，使它在有限的生命线段内尽可能发出最大的光和热。
Youth times cherish every moment, make it as maximum as possible in the limited life line light and heat.
另外对起点和终点是线段内的情况也进行了处理，使路段中间的点也能被选为起点、终点或回避点。
It deals with some avoid points, that is when searching for the shortest path, avoid points can be neglected.
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