Find out the name of a fruit. This fruit looks like an orange and its flesh is like an orange.

Citrus. Small evergreen trees or shrubs, about 2 meters high. Branchlets are thinner, glabrous and usually spiny. Leaves ovate-lanceolate, 4 ~ 8 cm long. Flowers yellow and white, solitary or clustered leaf axils. The fruit is oblate, 5 ~ 7 cm in diameter, orange-yellow or orange-red, with thin peel and easy peeling. It blooms in spring and matures in February 10 ~ 10. Sex likes warm and humid climate, and its cold tolerance is slightly stronger than pomelo, lime and sweet orange. Citrus is a tropical and subtropical evergreen fruit tree (except Fructus Aurantii), and there are three genera of Fructus Aurantii, Citrus and Kumquat used for economic cultivation. Citrus grown in China and other countries in the world is mainly citrus.