string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8B%BC%E5%A4%9A%E5%A4%9A%E5%B8%82%E5%9C%BA%E9%A3%8E%E9%99%A9%E5%BA%94%E5%AF%B9%E7%AD%96%E7%95%A5%E7%A0%94%E7%A9%B6 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
拼多多市场风险应对策略研究
