Yeap, well looks like she already told you...Good luck with whatever piece you needed to know that for.
~Always be more concerned about your character then your reputation, because your character is who you are, your reputation is what people think you are~
~D3S1R3@
The trill from D to E in the second octave is exactly as boglarka just described, for the third octave D to E, try fingering D and trilling the left ring finger. You could also try putting down the left index finger (harmonic trill).