Examples:

• Obviously, I had to be careful in my choice of assistant.
• Very good place, one should be careful with the entrance.
• Don't let him out of your sight, and be careful.
• As in any public place, be careful with your belongings.
• This Precog sees the future so we must be careful.
• Honey, just be careful you don't become one of them.
• Hey, tell them to be careful with Dr. Rosen, okay.
• As in any public place, be careful with your belongings.