Pear is cold and sweet, which has the effects of moistening lung, relieving cough, nourishing yin and clearing heat, and is especially suitable for autumn consumption. "Compendium of Materia Medica" records that pears are beneficial and versatile. It can treat wind and heat, moisten lung, cool heart, eliminate phlegm, reduce fire and detoxify. Modern medical research has proved that pears do have the functions of moistening lung, clearing dryness, relieving cough and resolving phlegm, nourishing blood and promoting granulation. Therefore, it has a good curative effect on symptoms such as dry throat, itching, pain, hoarseness, thick phlegm, constipation and red urine in patients with acute bronchitis and upper respiratory tract infection. Pear also has the effects of lowering blood pressure, nourishing yin and clearing heat, so it is beneficial for patients with hypertension, hepatitis and cirrhosis to eat pears often. Pears can be eaten raw, steamed or made into soup and soup. However, pears are cold and should not be eaten at one time. Especially those with spleen and stomach deficiency, abdominal cold pain and blood deficiency should not eat more. Pear fruit, peel, root, peel, branches and leaves can be used as medicine. It is cool, sweet, slightly sour, enters the lung and stomach meridians, and can promote fluid production, moisten dryness, clear heat and resolve phlegm. It is mainly used to treat body fluid injury caused by fever, hot cough, polydipsia, fright, burping and constipation. It has the effects of promoting digestion, relieving cough and resolving phlegm, nourishing yin and moistening lung, and relieving sores and alcoholism. Pear is cold, high in water content and sugar content, mainly soluble sugars such as fructose, glucose and sucrose, and contains a variety of organic acids, so it tastes sweet, and the juice is refreshing, sweet and pleasant. After eating, the mouth is cool, which is nutritious and can reduce fever. It can relieve cough, promote fluid production, clear heart and moisten throat, reduce fire and relieve summer heat, and it is a cool fruit with fever in summer and autumn. It can also moisten the lungs, relieve cough and resolve phlegm. It is effective for patients with cold, cough and acute and chronic tracheitis. Pears also have the functions of lowering blood pressure, nourishing yin, clearing away heat and calming the nerves. Because pears contain more glycoconjugates, tannins and vitamins, it is beneficial to eat pears often when patients with hypertension, heart and lung diseases, hepatitis and cirrhosis have symptoms such as dizziness, palpitation and tinnitus. Eating pears for hepatitis patients can protect the liver, help digestion and increase appetite. According to Xuan Tong of Materia Medica, pears "clear the heat of the five internal organs for the living and nourish the yin of the five internal organs for the ripe." That is, raw food belongs to real fire and cooked food belongs to virtual fire, and patients can choose as appropriate. For example, pear juice can cure fever. Adding water chestnut juice, lotus root juice, Ophiopogon japonicus juice and fresh reed root rice into raw pear juice to make a five-juice beverage, which can quench thirst, clear heat and relieve summer heat. It is suitable for thirst and blistering caused by high body fluid burn. Adding fresh Pogostemon cablin, Eupatorium odoratum, Lotus leaf, Radix Rehmanniae, Polygoni Multiflori Radix and Cymbidium leaves into pear juice can make a seven-juice beverage. Pear stew with other drugs can treat cough caused by deficiency fire. Take Bulbus Fritillariae Cirrhosae, almond and crystal sugar, put them into raw pears with pear cores, and stew them in water to cure chronic cough. Adding almonds and rock sugar to raw pears for steaming can cure dry cough, chronic bronchitis, dry cough, dry mouth and sore throat, dry intestine and constipation.