ところでこの件は注意する必要がある。の英語

This case requires watching, by the way.

Special care should be taken on this point.

I feel that a few more words are called for on this subject.

I must attend to this matter

One must observe caution in these matters.

This problem, however, should be considered more carefully.

You should note the fact

The fact is worthy of note.

We have to settle this matter once and for all.

This matter needs investigation.

must remain on your guard in such a situation

I have to be careful with that.

These are the important items to which careful attention is to be paid.

You must be especially attentive to the point

I beg to call your especial attention to this point.

You must be extremely cautious in handling that.

This must be taken into account.

I must call public attention to the fact.

We have to study the matter.

I have to care about that.

The occasion demands a cool head.

This should be your first [primary] concern.

This should be uppermost in your mind.

This one fact shows how the tide of opinion is setting.

I have to pay enough attention to that.

We have to consider the problem more carefully.

I should always keep this fact in mind.

We must get the matter into shape―settle the matter―somehow.

I have to keep my mind on this important question.

The matter requires close attention.