string(309) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%87%80%E5%88%A9%E6%B6%A6%E7%9A%84%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F%E4%B8%BA%3A%E5%87%80%E5%88%A9%E6%B6%A6%3D-%E6%89%80%E5%BE%97%E7%A8%8E%E8%B4%B9%E7%94%A8 => Received HTTP code 403 from proxy after CONNECT"
净利润的计算公式为:净利润=-所得税费用
