string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%8B%97%E5%A4%B4%E9%87%91%E5%8F%AF%E4%BB%A5%E4%B9%B0%E5%8D%96%E5%90%97 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
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