小方要在程序中生成[10, 99]之间的随机整数， 下列程序不能实现的是？ （ ）
import random
a = random. randint(10, 99)
import random as t
a = t. randint(10, 99)
from random import randint
a = randint(10, 99)
from random import randint as t