Your tree looks quite normal. I do see a little manganese deficiency, on the young newer leaves, but that almost always goes away. You can apply manganese sulfate, or manganese nitrate if you wish, but the tree should take care of the problem on its own as the new leaves fully mature. For your information the symptoms of an manganese deficiency are: New leaves with darker green veins WITH green border areas to the sides of the veins, on an otherwise yellow leaf, and leaves normal in size.