In the conversation between the patient and the nursing assistant, the questions asked by the nursing assistant can be characterized as follows:
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"How are you feeling now?" - This is an open-ended question as it encourages the patient to describe their current condition in more detail rather than answering with a simple "yes" or "no."
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"How does it feel when you take a deep breath?" - This is also an open-ended question because it requires the patient to describe their experience regarding the pain associated with breathing.
Based on this analysis, the type of questions the nursing assistant is asking are open-ended questions.