string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BE%BF%E5%88%A9%E5%BA%97%E5%9F%B9%E8%AE%AD%E5%BF%83%E5%BE%97%E4%BD%93%E4%BC%9A%E6%9C%80%E6%96%B0 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
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