A 31-yeаr-оld wоmаn is diаgnоsed with pelvic inflammatory disease. She denies any nausea or vomiting, and she prefers to have outpatient therapy. A pregnancy test is performed and it is negative. She weighs 57 kg. Which one of the following is an appropriate outpatient antimicrobial regimen for treating mild-to-moderate pelvic inflammatory disease (PID)?