“开局一张图，内容全靠编”‌，就下面这张图片，可以说出无数个版本。

图7.1 某患者的临床照片（a、b），表现为急性起病的右侧无痛性“足下垂”、无法背屈以及跨阈步态。体格检查显示，右足背屈及外翻肌力均减弱（2/5）。
Fig.7.1 Clinical photographs (a, b) in a patient with acute right-sided painless "foot drop," inability to dorsiflex, and steppage gait. In physical examination, both dorsiflexion and eversion of the right foot are weak (2/5)