A 35-year-old female patient with a history of chronic kidney disease is being transported to a higher-level care facility. She presents with pallor, fatigue, and shortness of breath. Labs show a hemoglobin level of 7 g/dL and a hematocrit of 21%. During transport, what is the most appropriate immediate intervention?
Transfuse 1-2 units of packed red blood cells (PRBCs)
Start intravenous iron therapy
Administer erythropoietin
Administer diuretics for symptom relief