diff --git a/game/builtin/ranking_list.go b/game/builtin/ranking_list.go
index 80139c3..9d144e0 100644
--- a/game/builtin/ranking_list.go
+++ b/game/builtin/ranking_list.go
@@ -87,6 +87,7 @@ func (slf *RankingList[CompetitorID, Score]) Size() int {
 }
 
 // GetRank 获取竞争者排名
+//   - 排名从 0 开始
 func (slf *RankingList[CompetitorID, Score]) GetRank(competitorId CompetitorID) (int, error) {
 	competitorScore, exist := slf.competitors.GetExist(competitorId)
 	if !exist {
diff --git a/game/ranking_list.go b/game/ranking_list.go
index a74f145..b20479e 100644
--- a/game/ranking_list.go
+++ b/game/ranking_list.go
@@ -12,6 +12,7 @@ type RankingList[CompetitorID comparable, Score generic.Ordered] interface {
 	// Size 获取竞争者数量
 	Size() int
 	// GetRank 获取竞争者排名
+	//  - 排名从 0 开始
 	GetRank(competitorId CompetitorID) (int, error)
 	// GetCompetitor 获取特定排名的竞争者
 	GetCompetitor(rank int) (CompetitorID, error)