string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%BA%E6%89%8D%E8%AE%A4%E5%AE%9A%E4%BE%9D%E6%8D%AE%E5%86%85%E5%AE%B9 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
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