An 8-month-old boy has been suffering from a persistent high fever for 6 days, despite using various fever-reducing medications including Merck and Fever Suppository. The fever has recurred. Over the past 3 weeks, he has been treated at Xinhua Hospital in Shanghai, where the doctor prescribed pediatric Chai Gui Granules and Azithromycin, but the condition has not improved. On the fifth day, the doctor suggested intravenous fluid therapy (Azithromycin for inflammation), but the low-grade fever persisted. Currently, the baby is experiencing diarrhea and crying and feeling weak at night. Physical cooling and medication treatment have been adopted, but the fever still persists. How should one handle this situation?