sand patch test

例句：

1. 1. The doctor performed a sand patch test to determine the cause of her rash.
   医生进行了沙斑试验，以确定她皮疹的原因。
2. 2. During the sand patch test, the patient was instructed to cover their skin with a piece of sandpaper.
   在沙斑试验期间，患者被指示用砂纸覆盖他们的皮肤。
3. 3. After the test, the doctor explained that the patient's reaction indicated an allergic reaction to the sand.
   测试后，医生解释说患者的反应表明对沙子有过敏反应。