There is a very specific kind of hunger that arrives around 4 pm. Lunch feels like a distant memory, dinner is still hours away, and suddenly the office biscuit jar, vending machine or leftover sweets starts looking far more tempting than it did an hour ago. The problem is not snacking itself. A smart 4 pm snack can actually help you stay focused and prevent overeating at dinner. The trick is to keep something satisfying within arm’s reach. Here…