实验室检查值与电解质练习卷（附答案）

What does the term "left shift" mean on a white cell differential?

1. AMore lymphocytes than neutrophils in the blood
2. BA fall in all the white cell types together
3. CMore immature neutrophils (bands) than normal
4. DA rise in the number of eosinophils

Which blood marker is the most specific for injury to the heart muscle?

1. ATotal creatine kinase
2. BCardiac troponin
3. CLactate dehydrogenase
4. DSerum myoglobin

What is a typical reference range for the reticulocyte count in an adult?

1. AAbout 40–50% of red cells
2. BAbout 0.01–0.05% of red cells
3. CAbout 10–20% of red cells
4. DAbout 0.5–2% of red cells

A test has very high sensitivity for a disease. What does a negative result mean?

1. AThe result cannot be used, because sensitivity is high
2. BThe patient must have a different disease instead
3. CThe disease is unlikely, so it helps rule it out
4. DThe disease is certain, so treatment should begin

A patient with diabetes is found unconscious with a blood glucose of 38 mg/dL (2.1 mmol/L). Which treatment is appropriate?

1. AGlucagon by injection, or IV dextrose as prescribed
2. BGlucose tablets placed between the patient's teeth
3. CA dose of rapid-acting insulin to stabilize the glucose
4. DOrange juice poured slowly into the patient's mouth

A patient with chronic kidney disease has a potassium of 5.6 mEq/L. Which food should the nurse advise the patient to limit?

1. AApples
2. BWhite rice
3. CBananas
4. DCabbage

一名血小板计数为 35 × 10³/µL 的患者被开具肌内注射。护士应怎么做？

1. A询问开医嘱者是否可以改用其他途径
2. B注射后热敷
3. C按处方注射，并用力按摩注射部位
4. D用更长的针头注射

A 68-year-old man has fatigue, a hemoglobin of 9.8 g/dL (98 g/L), an MCV of 72 fL and a low ferritin. He eats a normal diet. What is the most important next step?

1. AStart vitamin B₁₂ injections
2. BGive iron and do no further tests at all
3. CLook for a source of blood loss in the gut
4. DRepeat the blood count in one year