string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%89%93%E5%BC%80%E4%B8%8D%E4%BA%86%E5%A4%A9%E6%AD%A3%E7%94%BB%E7%9A%84%E5%9B%BE%E7%BA%B8 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
cad打开不了天正画的图纸
