string(303) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8A%96%E9%9F%B3%E6%B8%85%E7%90%86%E7%BC%93%E5%AD%98%E5%90%8E%E5%8D%A0%E7%94%A8%E5%86%85%E5%AD%98%E4%BB%8D%E7%84%B6%E5%BE%88%E5%A4%A7 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
抖音清理缓存后占用内存仍然很大
