string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%AC%E4%BC%97%E5%B9%B3%E5%8F%B0%E6%8E%A8%E5%B9%BF%E6%96%B9%E5%BC%8F => Failed to connect to 101.89.117.144 port 38022: Connection refused"
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