diff --git a/assets/section_2.5_1686968005870_0.edn b/assets/section_2.5_1686968005870_0.edn
index c933e37..c23b8ae 100644
--- a/assets/section_2.5_1686968005870_0.edn
+++ b/assets/section_2.5_1686968005870_0.edn
@@ -189,5 +189,17 @@
                           :rects (),
                           :page 42},
                :content {:text "[:span]", :image 1686973793408},
+               :properties {:color "yellow"}}
+              {:id #uuid "648d2dcb-a1da-4b22-99c8-ddcc0f059cff",
+               :page 46,
+               :position {:bounding {:x1 40,
+                                     :y1 83.666015625,
+                                     :x2 671,
+                                     :y2 486.666015625,
+                                     :width 677.2919999999999,
+                                     :height 507.96853333333326},
+                          :rects (),
+                          :page 46},
+               :content {:text "[:span]", :image 1686973897800},
                :properties {:color "yellow"}}],
  :extra {:page 46}}
diff --git a/assets/section_2.5_1686968005870_0/46_648d2dcb-a1da-4b22-99c8-ddcc0f059cff_1686973897800.png b/assets/section_2.5_1686968005870_0/46_648d2dcb-a1da-4b22-99c8-ddcc0f059cff_1686973897800.png
new file mode 100644
index 0000000..7c85b2a
Binary files /dev/null and b/assets/section_2.5_1686968005870_0/46_648d2dcb-a1da-4b22-99c8-ddcc0f059cff_1686973897800.png differ
diff --git a/pages/hls__section_2.5_1686968005870_0.md b/pages/hls__section_2.5_1686968005870_0.md
index 0bce074..6aa3f78 100644
--- a/pages/hls__section_2.5_1686968005870_0.md
+++ b/pages/hls__section_2.5_1686968005870_0.md
@@ -112,4 +112,11 @@ file-path:: ../assets/section_2.5_1686968005870_0.pdf
   hl-color:: yellow
   id:: 648d2d62-f5e5-491f-ae12-e9638ee75f7c
   hl-type:: area
-  hl-stamp:: 1686973793408
\ No newline at end of file
+  hl-stamp:: 1686973793408
+- [:span]
+  ls-type:: annotation
+  hl-page:: 46
+  hl-color:: yellow
+  id:: 648d2dcb-a1da-4b22-99c8-ddcc0f059cff
+  hl-type:: area
+  hl-stamp:: 1686973897800
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 705f302..4c8f1c6 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2720,6 +2720,7 @@
 							- ((648c48ac-76be-4848-af0d-1532467c8d68))
 					- Mathematical Expectation and Variance ![section 2.3.pdf](../assets/section_2.3_1686916498071_0.pdf)
 						- Expectation
+						  collapsed:: true
 							- Definitions :-> ((648c4e9e-5515-4da3-bc6b-39d6969f5f14))
 							  id:: 648c4e9f-7b40-4df5-ab81-e6eb49536831
 							- Examples:
@@ -2730,22 +2731,29 @@
 									- ((648c52d9-ea03-4835-8080-52ba5e6c3122))
 							- Expectation of compound **functions**: (Expectation of Functions of a Random Variable) (Replace $$x$$ with $$g(x)$$) #flashcard
 							  id:: 648c52dc-1cfe-4c05-888a-d8ddff10c24e
+							  collapsed:: true
 								- ((648c5381-49cd-4701-ba48-31c0e21474a7))
 							- Properties:
+							  collapsed:: true
 								- ((648c568e-c617-4699-b217-fd4e8ea205bc))
 								- Linerarity:
 								  ((648c569c-e3d0-445d-acf6-caf0e271f7be))
 						- Variance
+						  collapsed:: true
 							- Definition:
+							  collapsed:: true
 								- ((648c57b6-225a-4926-9ce1-8d0e7aae1391))
 								- Alternative calculation:
+								  collapsed:: true
 									- ((648c580f-8ccb-4fd3-bc0d-24ab109f240d))
 								- ((648c57d7-8f76-4520-8bc0-b54953bbe4cf))
 								- Standard variance: ((648c57e8-e79a-48b6-98cf-f68dc0e5277e))
 								- Properties
+								  collapsed:: true
 									- ((648c5982-4b4f-4935-ad4f-de93462bc564))
 									- ((648c5a58-62da-4c15-b22d-00e839b8f909))
 								- Examples
+								  collapsed:: true
 									- ((648c5b1c-533d-434a-b118-6a61cc9abb3a)) #flashcard
 									  id:: 648c5ae4-9e42-4c55-86d0-b0a19dfcb4dc
 									  collapsed:: true
@@ -2755,6 +2763,7 @@
 							- Definition :-> ((648c5c3a-160a-41ff-9cc7-83e750e3e8fa))
 							  id:: 648c5c30-6a99-41f4-be4c-e5e22387647a
 						- Application of Expectation and Variation
+						  collapsed:: true
 							- *Markov's inequality*: when **only mean** is known #flashcard
 							  id:: 648c5c5c-623c-43de-b750-b997db48e6dd
 							  collapsed:: true
@@ -2847,8 +2856,8 @@
 									  collapsed:: true
 										- ((648d2cfd-2cef-48d2-b791-e5ac01e43fd8))
 								-
-						- ==Summary== #flashcard
-							-
+					- ==Summary== #flashcard Bernoulli, Binomial, Geometric, Poisson, Uniform, Exponential, Normal
+						- ((648d2dcb-a1da-4b22-99c8-ddcc0f059cff))
 				-
 				-
 			- LATER 学积分