string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E5%9B%BE%E6%A1%A3%E5%86%85%E5%AD%98%E5%A4%AA%E5%A4%A7%E5%A6%82%E4%BD%95%E5%8F%98%E5%B0%8F => Failed to connect to 101.89.159.206 port 38075: Connection refused"
cad图档内存太大如何变小
