string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=r%E5%95%86%E6%A0%87%E4%B8%8Etm%E5%95%86%E6%A0%87%E5%8C%BA%E5%88%AB => Failed to connect to 101.89.117.144 port 38022: Connection refused"
r商标与tm商标区别
