有關巴洛克鍵盤音樂的彈奏方法

This is a very difficult question. However, from reading your question, I suspect that you have unknowingly skipped some important steps. Your question sounds a bit like someone asking how to drive fast without even knowing how to start a car. So let's back up a few steps.
First, when playing anything of Bach, you have to know what Bach was trying to write: what type of dance or keyboard genre, in what national style, imitation of string music, etc.. This is one of the most difficult aspects of deciphering Bach's music, and an aspect that you need to spend time studying and trying out on the piano. Your teacher should be able to help you with that.
After deciding on the style you can then decide on the type of articulations as well as tempo. 音程比較遠的音通常都會斷開 can be loosely taken as a general rule, but is not always true, such as in music that resembles an allemande. Obviously in an Air you are not going to mince your phrases in little bits and pieces. Also, if the notes form an important harmony, such as at a cadential point or at a hemiola, it may not be advisable to 斷開 too much.
Without knowing the character and style of the music you are simply taking a big risk. In conclusion, you have to first understand the character and style Bach was writing, then everything else will come naturally. For example, you discovered (after some lengthy studies) that one of the inventions is written in the style of a French courante, then immediately you'd know the tempo (triple time, not too fast) and the appropriate articulation (very slightly detached, a bit dry but not too much), as well as general character (heavier on 1st and 3rd beat, a bit more solemn than an Italian corrente). Many factors have to be taken into consideration before embarking on subjective interpretative issues.
Hope this helps!

j.s bach彈奏方法,一般來說,以四分音符是斷奏的,八分音附為連奏.他以音色為主要,要是斷奏的地方,以斷奏音彈法而不是跳音,所為2,3部之分,只不過它的旋律分2部和3部合唱,深淺程度亦相差甚大,不一定3部會比2部難,只要將聲部分清楚就可以.

如果你有機會的話，多聽幾位大師在同一曲目上的彈奏方式，你會發覺所謂標準是不存在，他們祗有風格，但在你現在的情况，不需要說得那麽嚴重，你可以反複地比較不同樂譜的出入，自己取捨，又或者mix & match ,嫌麻煩的話,沒錯，以旋律的歌唱性作準，不是最好，也起碼順耳。