string(266) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E6%B8%85%E7%90%86%E7%94%B5%E8%84%91%E7%9A%84%E5%86%85%E5%AD%98%E5%AE%B9%E9%87%8F => Failed to connect to 101.89.120.29 port 38231: Connection refused"
怎么清理电脑的内存容量
