a panda, 是指一个熊猫，还是指熊猫类？
For example:
A panda usually roams up to 100 acres a day.这是指熊猫类。
A panda escaped the zoo。这是指一个熊猫。
那么，看看原文：
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Transportation expenses of a parent who must go with a child who needs medical care,
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Transportation expenses of a nurse or other person who can give injections, medications, or other treatment required by a patient who is traveling to get medical care and is unable to travel alone, and
假设金钱数目不是问题，这里的a nurse是指一个护士（陪伴病人旅行），还是护士类？我想应该是护士类，否则假设一个病人需要（required by a patient)两个护士，就不能报了吗？
同样，"a parent who must go with a child"，这个parent如果按父母类而不是一个父母理解，也说得通。一般做重大医疗决定需要两个父母同意，虽然可以打电话，一般孩子到外地去看病，两个父母跟着去，可以说是must。
