string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E7%A7%8D%E5%BE%88%E5%83%8F%E5%8C%85%E8%8F%9C%E7%9A%84%E8%94%AC%E8%8F%9C%E6%98%AF%E4%BB%80%E4%B9%88 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
一种很像包菜的蔬菜是什么
