You can't. Pitaya is rich in vitamin C, and milk is rich in protein. Eating together will cause protein precipitation and physical discomfort. It is recommended to eat separately at intervals of more than half an hour. Pitaya is also called Red Dragon Fruit, Dragon Pearl Fruit, Fairy Honey Fruit and Jade Dragon Fruit. Pitaya is rich in nutrition and unique in function. It contains rare plants, sexual albumin and anthocyanins, and is rich in vitamins and water-soluble dietary fiber. Belongs to cool fruit. In the natural state, the fruit ripens in summer and autumn and tastes sweet and juicy.