string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%83%E6%97%A6%E6%96%B0%E5%B9%B4%E6%96%87%E6%A1%88%E5%BE%AE%E4%BF%A1 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
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