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Find the intersection point of the line and the plane   .

A 55-year-old man with metastatic prostate cancer and painful vertebral lesions is started on zoledronic acid infusions to reduce skeletal-related events. His medications include leuprolide for androgen deprivation and calcium/vitamin D supplements. Two weeks after his first infusion, he reports perioral tingling and muscle cramps. On exam, he has a positive Chvostek’s sign. Which laboratory parameter is most important to monitor in this patient? 

A 66-year-old man with a history of rheumatoid arthritis controlled on methotrexate presents with fever, cough, and shortness of breath. Chest x-ray reveals a left lower lobe pneumonia. He is stable for outpatient management. Which action is most appropriate regarding his immunosuppressive therapy? 

A 67-year-old man hospitalized with COPD exacerbation is treated with high-dose IV steroids. The NP plans to taper steroids after recovery. Why is tapering required? 

A 52-year-old woman presents with severe vasomotor symptoms including hot flashes and night sweats that interfere with her sleep and quality of life. She underwent a total abdominal hysterectomy with bilateral salpingo-oophorectomy 10 years ago for fibroids. She has no history of thromboembolic disease, breast cancer, or cardiovascular disease. BMI is 24, blood pressure 122/76, and mammogram is normal. She requests hormone therapy after conservative measures failed. Which regimen is most appropriate? 

A 30-year-old pregnant woman tests positive for syphilis (RPR titer 1:64, treponemal confirmatory positive). She reports severe urticaria and dyspnea after penicillin in the past. Which is the most appropriate management? 

A 17-year-old sexually active adolescent presents with dysuria and vaginal discharge. NAAT is positive for Chlamydia trachomatis. She is otherwise healthy and not pregnant. What is the CDC-recommended treatment? 

A 70-year-old woman with postmenopausal osteoporosis is unable to tolerate oral alendronate due to severe esophagitis despite appropriate administration (upright posture, fasting intake). Her history includes stage 3 chronic kidney disease (eGFR 45 mL/min) and prior vertebral compression fracture. She continues calcium and vitamin D supplementation. Which pharmacologic alternative is most appropriate for secondary fracture prevention? 

Which ophthalmic condition is treated with antihistamine/mast cell stabilizers? 

Which agent is first-line for induction and maintenance of remission in mild ulcerative colitis?