string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BA%97%E5%8A%A1%E5%8A%A9%E6%89%8B%E5%AE%98%E7%BD%91%E7%99%BB%E5%BD%95 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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