attend ** 与 attend to ** 都对吗? 有什么区别?

Melanie attend sb 陪伴，伴同。很正式的用法

attend to sb 赐顾帮衬，关心。

马上又 attend to sb 同时还有很正式的用法,意思是，“存眷，重视”

attend sb 陪伴,伴同

attend to sb 看管(病人)