You use realistically when you want to emphasize that what you are saying is true, even though you would prefer it not to be true. 实际上 (用以强调尽管不希望，但所说内容却是真实的)
adverb
[方式副词]
现实地；实际地；逼真地
Realistically, there is never one right answer.
实际上，从来没有一个正确的答案。
后缀: ally
【adverb】 以某种方式 - in a manner of
原词: realistically
是通过后缀 【ally】 构成的派生词
