string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8C%97%E4%BA%AC%E6%9C%80%E5%A4%A7%E5%A4%96%E8%B4%B8%E6%9C%8D%E8%A3%85%E5%B8%82%E5%9C%BA%E5%9C%B0%E5%9D%80%E7%94%B5%E8%AF%9D => Failed to connect to 101.89.117.144 port 38056: Connection refused"
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