A client diagnosed with acute pancreatitis reports severe, knifelike pain radiating to the back. Which intervention should the nurse prioritize to manage this symptom?

Administer prescribed opioid analgesics for pain relief.

Apply heat packs to the abdomen to reduce discomfort.

Encourage the client to eat small, frequent meals to alleviate pain.

Perform a comprehensive abdominal examination to locate the source of pain.