How Do Doctors Do It, It Being To Handle ,

How do doctors do it, it being to handle , deal with and treat those who ask questions on here who seem obvious to me to be partry lying for example the one that mentions worry and stress over having to do urine test for drug court and had "sat down " in a room" with a friend who smoked some Meth wondering if that would result in a positive result and failed drug test . How do you not judge and how do you look past it ?