英文一問..

MTR係香港既地鐵"牌子 "名.
而且係簡稱添.
(長寫係 Mass Transit Railway).

正如, Chanel, Prada, Fendi... 等等,
係手袋牌子名,
手袋既英文係handbag.

地鐵, 你可以用 subway (美式).
或 underground (英式).
希望幫到你.

Likely they don't know what is MTR. Next time try to use words like subway, the tube, the underground.

Something like: "You can take the subway. To go to the subway station, go straight ahead and make a left turn... (give directions). It is only three stations away. We call the subway MTR here."