string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%87%8D%E5%A4%8D%E9%93%BA%E8%B4%A7%E7%9A%84%E5%88%A4%E5%AE%9A%E6%A0%87%E5%87%86 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
重复铺货的判定标准
