string(250) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ps%E4%B8%B4%E6%97%B6%E6%96%87%E4%BB%B6%E4%BF%9D%E5%AD%98%E8%B7%AF%E5%BE%84c%E7%9B%98 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
ps临时文件保存路径c盘
