string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%8B%B1%E7%89%B9%E5%B0%94%E8%BD%BB%E8%96%84%E6%9C%AC%E6%8E%A8%E8%8D%90 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
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