string(311) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%9B%E4%B8%9A%E5%A4%B1%E8%B4%A5%E6%A1%88%E4%BE%8B%E6%8F%8F%E8%BF%B0%E5%85%B6%E9%9D%A2%E4%B8%B4%E4%BA%86%E5%93%AA%E4%BA%9B%E5%88%9B%E4%B8%9A%E9%A3%8E%E9%99%A9 => Received HTTP code 403 from proxy after CONNECT"
创业失败案例描述其面临了哪些创业风险
