Final answer:
Dr. Kanas is using a cognitive-behavioral approach.
Step-by-step explanation:
The approach that Dr. Kanas is using in his treatment of this client is a cognitive-behavioral approach.
Cognitive-behavioral therapy focuses on examining negative thinking patterns and helping individuals change their thoughts and behaviors to improve their mental health. In this case, Dr. Kanas is addressing the client's anxiety and feeling of pressure at work by exploring their negative thinking patterns and using therapeutic strategies to modify them. This approach aims to help the client develop healthier coping strategies and alleviate their anxiety symptoms.