Translation of "Fantasy" in Chinese

You're just comforting yourself with a fantasy!

你这样就是畫餅充飢！

Reality and fantasy are hard to distinguish.

現實和幻想是很難區分的。

He lives in a world of fantasy.

他住在一個奇幻世界裡。

Mathematicians are poets, except that they have to prove what their fantasy creates.

數學家是詩人，不過他們必須也能證明他們想像力的果實。