string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%8B%8F%E5%A9%B7%E4%BA%8C%E5%BB%BA2023%E6%9C%BA%E7%94%B5%E6%A1%88%E4%BE%8B => Failed to connect to 14.18.117.71 port 38069: Connection refused"
苏婷二建2023机电案例
