Fun wow! Words: quack, quack; quadrangle, quadrant, quadrilateral

Ever visited a medical quack,
So askew, the sick endlessly go back?
Ever heard a doctor, who sounded like a duck...
Quack, quack, quack...
Now ain't that just our luck?

Me thinks medics should setup stands,
Alongside a piazza, square, or quadrangle parallelogram.
Wherever folks socialize and amass,
Be it an outdoor patio, or wherever folks crash.

Perhaps on a trapezoid configuration,
A rhombus, trapezium 'n such,
BE it a cement platform,
Or the fourth of a circle, for lunch.

Any quadrilateral surface would do,
Then everyone could choose,
What sage remedy would best repair,
Ailments, which sicken me and you.