string(252) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=CAD%E5%A6%82%E4%BD%95%E6%B8%85%E7%90%86%E5%A4%9A%E4%BD%99%E7%9A%84%E7%BA%BF%E6%9D%A1 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
CAD如何清理多余的线条
