What is the sound of "切" in "望闻问切" in the four diagnoses of traditional Chinese medicine?

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Taking the pulse, also known as cutting the pulse, is a diagnostic method in which a Chinese medicine practitioner presses the patient's arteries with his hand and, based on the pulse, learns about the inner changes of the disease. Pulse cutting has a long history, which reflects the characteristics and experience of Chinese medicine in diagnosing diseases. Pulse, can be understood as the image of pulse.

Pulse cutting is an original diagnostic method created by ancient Chinese traditional medicine practitioners. In recent times, Western doctors are accustomed to using stethoscopes to see diseases, while Chinese medicine practitioners have been accustomed to pulse diagnosis for more than 2,000 years, i.e., to press the pulse with the fingers and diagnose the disease according to the pulse. A set of theory system of Chinese medicine is also unique to the world.