string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8C%96%E5%A6%86%E5%93%81%E4%B8%80%E9%94%AE%E4%BB%A3%E5%8F%91%E5%B9%B3%E5%8F%B0 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
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