A clue is often in the prepositions if you're telling someone to turn, it often comes with a preposition at for example, go right at the main road, whereas the preposition up, go right up the main road tends to mean go all the way up the main road, but if you're not sure, just ask.
一個線索往往在介詞中,如果你告訴別人要轉彎,它往往伴隨著介詞at,例如,在大路右轉,而介詞up,在大路上右轉往往是指在大路上一直走下去,但如果你不確定,就問一下。