I tell my advisors (doctor, dentist, financial advisor, etc.) to "Use the right words, even if they're big. Explain what you have time for and I'll look up the rest."
One persisted in simply telling me he was going to give me "medicine." I found another perveyor of the healing arts.
I'll vote for the long explanation. Anyone who doesn't understand the answer can ask follow-up questions.
Thank you Steve, M.B. Doc, Benzmac, Larry and all of the others who increase the knowledge pool here.