Final answer:
For a severe ankle sprain, use the RICE technique and monitor the injury. If a ligament tear or fracture is involved, surgery may be necessary.
Step-by-step explanation:
When dealing with a severe left ankle sprain, like the one sustained by the 15-year-old female soccer player, the recommended course of action typically involves the RICE technique, which stands for Rest, Ice, Compression, and Elevation. Since she has been non-weightbearing on crutches for the past two weeks, it is crucial to continue monitoring her recovery progress. In case of severe injuries, where ligament tears or bone fractures might be present, the patient may require more advanced treatments, potentially including surgery. Ankle sprains, particularly severe ones, need careful management to ensure proper healing and to minimize the risk of long-term complications.