don't touch a child on还是in the head

don't touch a child on还是in the head don't touch a child on he head Don‘t touch a child on the hard in Thailand为什么用on不用in you should't touch a child on the head (英文意思） Don't touch that( )child.----(sleep) Don't bury your head in the There's a sign on the wall .It ____"Don't touch." Don’t forget the touch the man was hit on the head ___ a stone while traveling in t Don't have one's head in the clouds Don't forget tokeep in touch hit sb in the head还是 hit sb on the head? 有什么区别?