string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%8B%B9%E6%9E%9C%E6%B8%85%E7%90%86%E5%86%85%E5%AD%98%E6%80%8E%E4%B9%88%E6%B8%85%E7%90%86 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
苹果清理内存怎么清理
