Bitter gourd (towel gourd) is only available in winter, but it seems to be the best.
Cucumber, celery and potatoes are available all the year round and cheap.
No, look at the bottom
Watermelon and pear are sweet and cold, which can clear away heat and reduce fire, moisten lung and resolve phlegm.
Olive is sweet and sour, clearing away heat, relieving sore throat and detoxifying.
Carambola can produce fluid to stop drinking, dispel wind and heat, and induce diuresis.
Apples can produce fluid to quench thirst.
Grapes clear blood heat and induce diuresis.
Pineapple can clear summer heat and induce diuresis.
Persimmons can clear away heat and promote fluid production, moisten the lungs and quench thirst.
Loquat can clear lung and relieve cough.
Plums can clear liver fire and induce diuresis to promote fluid production.
Attention should also be paid to eating fruits, some of which are hot fruits.
Such as litchi, orange, pineapple, longan, pomegranate and so on.