string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BC%A9%E7%9F%AD%E5%85%B3%E9%94%AE%E7%BA%BF%E8%B7%AF%E7%9A%84%E6%96%B9%E6%B3%95%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 101.89.159.206 port 38075: Connection refused"
缩短关键线路的方法有哪些
