string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%9C%89%E4%BA%9B%E5%9B%BE%E7%BA%B8%E6%89%93%E4%B8%8D%E5%BC%80%E6%80%8E%E4%B9%88%E5%8A%9E => Failed to connect to 101.89.117.144 port 38022: Connection refused"
cad有些图纸打不开怎么办
