string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ipad%E8%A6%81%E6%80%8E%E4%B9%88%E6%B8%85%E7%90%86%E5%86%85%E5%AD%98%E5%92%8C%E5%86%85%E5%AD%98 => Failed to connect to 101.91.112.32 port 38195: Connection refused"
ipad要怎么清理内存和内存
