阅读以下文本，并找出其中的三个关键词。输出这些关键词和它们在文本中的出现次数。
Strawberries are one of the most delicious and nutritious types of fruit. They are a great source of Vitamin C and antioxidants, which can help boost the immune system and prevent certain diseases. In addition to being healthy, strawberries are also very versatile and can be used in a variety of dishes, from sweet desserts to savory salads.
关键词：Strawberries，Vitamin C，antioxidants。它们分别在文本中出现了2次，2次和1次。