improvement 可數嗎

　　We expect to see further improvement over the coming year.

　　我們期望來年會有更進一步的改善。

　　We shall be looking for an improvement in your work this term.

　　我們期待你這學期功課有進步。

　　They applied for a home improvement loan.

　　他們申請了房屋修繕貸款。

　　Predictions of an early improvement in the housing market proved false.

　　認為房屋市場很快就有好轉的預測結果證明是錯誤的。

　　Is this situation not susceptible of improvement by legislation?

　　這種狀況有無可能通過立法加以改善？