Как употреблять предлог at?

Предлог "at" используется в следующих случаях, когда упоминаем:

Расположение или местонахождение: We spent the afternoon at a football match. Время: There is a meeting at 8.30 this morning. Направление: They waved at us as we drove by. Причину: We were surprised at the news. Оценивание способностей: She was never very good at sports. Цену, скорость, температуру: I am not going to buy those trousers at $150! Состояние: The country is now at war. Возраст: She left school at the age of 16.