string(250) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E5%A6%82%E4%BD%95%E6%8A%8A%E6%96%87%E4%BB%B6%E5%86%85%E5%AD%98%E5%8F%98%E5%B0%8F => Failed to connect to 14.116.215.7 port 38230: Connection refused"
cad如何把文件内存变小
