The preposition is "behind." The phrase "behind the patient's bed" modifies the verb "stood."
beside is the preposition
While the Nurse was comforting the patients the doctor gave them an injection.
Cut the gordian knot: rewrite the sentence: The good doctor treats patients with compassion or treats patients compassionately.
The doctor diagnosed the patients illness
Beside is the preposition. The phrase "beside his patient's bed" modifies the verb "stood."
The doctor praised her for being patient while waiting for test results.
The pronouns that will take the place of the noun 'eye doctor' are:he or she as the subject of a sentence or a clause;him or her as the object of a verb or a preposition.
The doctor has forgotten to remove the gauze from the patients stomach.
The doctor took a biopsy of a growth on the patients leg and sent it to the lab for analysis.
waiting room
470 patients per doctor
Not quite. Use "so that the doctor..." What the sentence means is unclear, however.