diff --git a/exercises/10_method_const/main.cpp b/exercises/10_method_const/main.cpp
index e040f9e1..5521be4d 100644
--- a/exercises/10_method_const/main.cpp
+++ b/exercises/10_method_const/main.cpp
@@ -1,5 +1,7 @@
 #include "../exercise.h"
 
+// READ: 有 cv 限定符的成员函数 <https://zh.cppreference.com/w/cpp/language/member_functions>
+
 struct Fibonacci {
     int numbers[11];
     // TODO: 修改方法签名和实现，使测试通过