string(299) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A5%B3%E5%AD%A9%E5%AD%A6%E4%BB%80%E4%B9%88%E4%B8%93%E4%B8%9A%E5%89%8D%E6%99%AF%E5%A5%BD%2C%E5%A5%BD%E5%B0%B1%E4%B8%9A2023%E5%B9%B4 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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