如何检查多维数组中的数组键？

def check_array_key(arr, target_key):
    if isinstance(arr, list):
        for i in range(len(arr)):
            if isinstance(arr[i], list):
                result = check_array_key(arr[i], target_key)
                if result:
                    return True
            elif i == target_key:
                return True
    return False

my_array = [[1, 2], [3, 4, 5], [6, 7, [8, 9]]]
target_key = 3

result = check_array_key(my_array, target_key)
print(result)  # 输出：True