string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=u%E7%9B%98%E5%9D%8F%E4%BA%86%E7%94%B5%E8%84%91%E8%AF%86%E5%88%AB%E4%B8%8D%E5%87%BA%E6%9D%A5%E4%BA%86 => Received HTTP code 403 from proxy after CONNECT"
u盘坏了电脑识别不出来了
