These results have to be interpreted _______ caution（谨慎）. （填入一个恰当的介词，使句意通顺。）

When I saw on the news that there would be no school tomorrow because of the snowstorm, I ______ jumped for joy, and hit my head on the ceiling fan.

语法特征（名词解释题）

A variation by 2% leads to a change in the bandgap（带隙）of about 80 meV.

With increasing experience, the cost of integrated circuits has fallen by 28% for each doubling of the total number of units ever produced.

The energy is measured in Rydbergs（里德伯）=13.5 electron volts（电子伏） and the interatomic distance in units of one tenth of a nanometer.

For every force in one direction there is an equal force in the opposite direction.

By its definition, we may also consider F as a function of temperature in finding its value.