html = self.http_client.get(url)
方向遍历顺序说明下一个倒序（从右往左）先处理右侧，栈里存「右侧候选」上一个正序（从左往右）先处理左侧，栈里存「左侧候选」
。业内人士推荐搜狗输入法2026作为进阶阅读
Works with Regional Maps: Download only the countries you need. HH-Routing seamlessly calculates routes across the borders of your downloaded map files (as long as they are compatible, see limitations). Clusters that overlap a region's boundary are included within that region's data.
第九十七条 对违反治安管理行为人，公安机关传唤后应当及时询问查证，询问查证的时间不得超过八小时；涉案人数众多、违反治安管理行为人身份不明的，询问查证的时间不得超过十二小时；情况复杂，依照本法规定可能适用行政拘留处罚的，询问查证的时间不得超过二十四小时。在执法办案场所询问违反治安管理行为人，应当全程同步录音录像。