diff --git a/assets/section_2.3_1686916498071_0.edn b/assets/section_2.3_1686916498071_0.edn
index ea26399..669f6da 100644
--- a/assets/section_2.3_1686916498071_0.edn
+++ b/assets/section_2.3_1686916498071_0.edn
@@ -205,5 +205,17 @@
                           :rects (),
                           :page 37},
                :content {:text "[:span]", :image 1686920250512},
+               :properties {:color "yellow"}}
+              {:id #uuid "648c5c6f-d6b4-4c65-b9a4-9f51f93f86ad",
+               :page 42,
+               :position {:bounding {:x1 37,
+                                     :y1 84.75,
+                                     :x2 694,
+                                     :y2 273.75,
+                                     :width 725.67,
+                                     :height 544.252},
+                          :rects (),
+                          :page 42},
+               :content {:text "[:span]", :image 1686920303152},
                :properties {:color "yellow"}}],
- :extra {:page 38}}
+ :extra {:page 43}}
diff --git a/assets/section_2.3_1686916498071_0/42_648c5c6f-d6b4-4c65-b9a4-9f51f93f86ad_1686920303152.png b/assets/section_2.3_1686916498071_0/42_648c5c6f-d6b4-4c65-b9a4-9f51f93f86ad_1686920303152.png
new file mode 100644
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diff --git a/pages/hls__section_2.3_1686916498071_0.md b/pages/hls__section_2.3_1686916498071_0.md
index 81165fc..6258433 100644
--- a/pages/hls__section_2.3_1686916498071_0.md
+++ b/pages/hls__section_2.3_1686916498071_0.md
@@ -103,4 +103,11 @@ file-path:: ../assets/section_2.3_1686916498071_0.pdf
   hl-color:: yellow
   id:: 648c5c3a-160a-41ff-9cc7-83e750e3e8fa
   hl-type:: area
-  hl-stamp:: 1686920250512
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+  hl-stamp:: 1686920250512
+- [:span]
+  ls-type:: annotation
+  hl-page:: 42
+  hl-color:: yellow
+  id:: 648c5c6f-d6b4-4c65-b9a4-9f51f93f86ad
+  hl-type:: area
+  hl-stamp:: 1686920303152
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 60110ee..fa3e3eb 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2750,8 +2750,12 @@
 									- ((648c5b1c-533d-434a-b118-6a61cc9abb3a)) #flashcard
 									  collapsed:: true
 										- ((648c5b30-e75f-4f0c-bb7d-985442728fbe))
-						- Moments of random variable
+						- LATER Moments of random variable
 							- Definition :-> ((648c5c3a-160a-41ff-9cc7-83e750e3e8fa))
+						- Application of Expectation and Variation
+							- Markov's inequality
+								- ((648c5c6f-d6b4-4c65-b9a4-9f51f93f86ad))
+						-
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01