string(315) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E4%B8%80%E6%89%93%E5%BC%80%E5%9B%BE%E7%BA%B8%E5%B0%B1%E5%B4%A9%E6%BA%83%E6%98%AF%E4%BB%80%E4%B9%88%E5%8E%9F%E5%9B%A0%E9%80%A0%E6%88%90%E7%9A%84 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
cad一打开图纸就崩溃是什么原因造成的
