diff --git a/assets/section_2.3_1686916498071_0.edn b/assets/section_2.3_1686916498071_0.edn
index 669f6da..7aacc62 100644
--- a/assets/section_2.3_1686916498071_0.edn
+++ b/assets/section_2.3_1686916498071_0.edn
@@ -217,5 +217,17 @@
                           :rects (),
                           :page 42},
                :content {:text "[:span]", :image 1686920303152},
+               :properties {:color "yellow"}}
+              {:id #uuid "648c5c81-d93b-4859-9ee0-37cceb8fd100",
+               :page 43,
+               :position {:bounding {:x1 40,
+                                     :y1 65.416015625,
+                                     :x2 689,
+                                     :y2 255.416015625,
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+                                     :height 544.252},
+                          :rects (),
+                          :page 43},
+               :content {:text "[:span]", :image 1686920320810},
                :properties {:color "yellow"}}],
- :extra {:page 43}}
+ :extra {:page 45}}
diff --git a/assets/section_2.3_1686916498071_0/43_648c5c81-d93b-4859-9ee0-37cceb8fd100_1686920320810.png b/assets/section_2.3_1686916498071_0/43_648c5c81-d93b-4859-9ee0-37cceb8fd100_1686920320810.png
new file mode 100644
index 0000000..eda10bd
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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 6258433..97b71d5 100644
--- a/pages/hls__section_2.3_1686916498071_0.md
+++ b/pages/hls__section_2.3_1686916498071_0.md
@@ -110,4 +110,11 @@ file-path:: ../assets/section_2.3_1686916498071_0.pdf
   hl-color:: yellow
   id:: 648c5c6f-d6b4-4c65-b9a4-9f51f93f86ad
   hl-type:: area
-  hl-stamp:: 1686920303152
\ No newline at end of file
+  hl-stamp:: 1686920303152
+- [:span]
+  ls-type:: annotation
+  hl-page:: 43
+  hl-color:: yellow
+  id:: 648c5c81-d93b-4859-9ee0-37cceb8fd100
+  hl-type:: area
+  hl-stamp:: 1686920320810
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index fa3e3eb..2ce8bfe 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2753,8 +2753,10 @@
 						- LATER Moments of random variable
 							- Definition :-> ((648c5c3a-160a-41ff-9cc7-83e750e3e8fa))
 						- Application of Expectation and Variation
-							- Markov's inequality
+							- Markov's inequality #flashcard
 								- ((648c5c6f-d6b4-4c65-b9a4-9f51f93f86ad))
+							- Chebyshev's inequality #flashcard
+								- ((648c5c81-d93b-4859-9ee0-37cceb8fd100))
 						-
 			- LATER 学积分
 			  :LOGBOOK: