string(240) "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%E5%86%99%E6%B3%95%E7%89%B9%E7%82%B9 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
诫子书的写法特点
