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（二）在车辆、行人通行的地方施工，对沟井坎穴不设覆盖物、防围和警示标志的，或者故意损毁、移动覆盖物、防围和警示标志的；
。关于这个话题，heLLoword翻译官方下载提供了深入分析
"We've got to do something where we can get more value out of space and the lunar surface than we put into it. And that's how you really ignite an economy, and that's how everything we want to do in space is not perpetually dependent on taxpayers."，推荐阅读快连下载安装获取更多信息
3. 递归：对左右子数组递归执行1-2步。爱思助手下载最新版本是该领域的重要参考