The American Academy of Nursing defines nursing as the science of diagnosing and treating human responses to existing or potential health problems. This definition reflects four essential features of nursing in modern clinical practice: first, making sense of the phenomenon: nurses need to observe patients' responses to existing or potential health problems by collecting patient data during nursing care. Second, applying nursing theories to explain the phenomena: applying modern nursing theories to further analyze the collected data, deepen the understanding, and create prerequisites for solving these problems. Third, to carry out nursing work under the guidance of nursing theories: to assist the doctor to save the patient's life and reduce the patient's pain through nursing means and methods . Promote patients' recovery. Fourth, health evaluation: evaluating the effectiveness of patients' responses to health problems through a series of nursing activities. This requires nursing workers in clinical nursing work to do: first, active service: including new patients admitted to the hospital, the nursing staff of the department initiative enthusiasm, for patients to arrange the admission matters, introduce the patients in the same room, the responsible nurse, the supervising physician and other personnel; in the room visits, nursing operations, with a smile, pay attention to the details of the operation, the protection of patients' personal privacy, and to remind the patients to pay attention to the warmth of the patient, and so on, to reflect the people-oriented, patient-centered holistic care ideas. Patient-centered holistic nursing ideology; patients are discharged with a smile on the face of the medical staff, instructing patients to pay attention to matters and details after discharge. Secondly, active observation: including careful rounds of the room, according to the characteristics of each patient's condition to focus on the observation and record, should be found in a timely manner the subtle changes in the patient's condition, to do before the onset of the disease, as far as possible to deal with the onset of the disease, and timely report to the physician, to obtain the cooperation; according to the focus on the condition of the different periods of time, and do a good job of disease-related knowledge for the patients, such as publicity and education. Third, take the initiative to think for the patients: communicate with the patients in an easy-going attitude, soft words, clear and easy to understand, and pay attention to observe the psychological changes of the patients and their psychological needs in the process of conversation. Fourth, the extension of services: the establishment of nursing files for frequently hospitalized patients, regular follow-up visits to patients.