string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%AF%AB%E5%AD%90%E4%B9%A6%E7%9A%84%E7%94%A8%E6%84%8F%E5%92%8C%E5%90%AF%E5%8F%91 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
诫子书的用意和启发
