string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B8%B8%E8%A7%81%E5%9B%BD%E5%AE%B6%E8%8B%B1%E6%96%87%E7%BC%A9%E5%86%99%E8%A1%A8 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
常见国家英文缩写表
