string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B7%80%E7%B2%89%E5%92%8C%E7%94%9F%E7%B2%89%E6%95%88%E6%9E%9C%E4%B8%80%E6%A0%B7%E5%90%97 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
淀粉和生粉效果一样吗
