由于气候变化，北极熊的数量急剧减少。

The population of polar bears has ___drastically decreased due to climate change.

自从新政策实施以来，情况有了显著改善。

The situation has improved ___drastically since the new policy was implemented.

政府需要采取激进措施来解决经济危机。

The government needs to act ___drastically to solve the economic crisis.