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self.session.headers.update({"Accept": "text/html,application/xhtml+xml"})。业内人士推荐51吃瓜作为进阶阅读
，推荐阅读同城约会获取更多信息
while current_url and current_url not in self.seen_urls:，更多细节参见夫子
从“一个弹簧”到“一片森林”：