string(330) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%AF%8D%E5%A9%B4%E5%BA%97%E6%8A%95%E8%B5%84%E5%BC%80%E6%AF%8D%E5%A9%B4%E5%BA%97%E9%9C%80%E8%A6%81%E4%BA%86%E8%A7%A3%E5%93%AA%E4%BA%9B%E7%9F%A5%E8%AF%86%E5%91%A2 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
母婴店投资开母婴店需要了解哪些知识呢
