That's a great drawing of your girlfriend, but you should emphasize the nose a bit more.
你的女友这张画像很漂亮,但你应该把她的鼻子再勾画一下。
which I found most helpful on the cross-country journey, but which I did not think I should need on the last stage.
在乡间行车途中,我觉得它非常有用,但快到家了,我倒觉得它没什么用了。