diff --git a/assets/section_2.3_1686916498071_0.edn b/assets/section_2.3_1686916498071_0.edn
index fa81984..ce6931e 100644
--- a/assets/section_2.3_1686916498071_0.edn
+++ b/assets/section_2.3_1686916498071_0.edn
@@ -241,5 +241,17 @@
                           :rects (),
                           :page 44},
                :content {:text "[:span]", :image 1686920437098},
+               :properties {:color "yellow"}}
+              {:id #uuid "648c5de0-d650-443a-8a67-768066dce154",
+               :page 45,
+               :position {:bounding {:x1 41,
+                                     :y1 150.33203125,
+                                     :x2 678,
+                                     :y2 422.33203125,
+                                     :width 725.67,
+                                     :height 544.252},
+                          :rects (),
+                          :page 45},
+               :content {:text "[:span]", :image 1686920671997},
                :properties {:color "yellow"}}],
- :extra {:page 45}}
+ :extra {:page 46}}
diff --git a/assets/section_2.3_1686916498071_0/45_648c5de0-d650-443a-8a67-768066dce154_1686920671997.png b/assets/section_2.3_1686916498071_0/45_648c5de0-d650-443a-8a67-768066dce154_1686920671997.png
new file mode 100644
index 0000000..308fb05
Binary files /dev/null and b/assets/section_2.3_1686916498071_0/45_648c5de0-d650-443a-8a67-768066dce154_1686920671997.png differ
diff --git a/pages/hls__section_2.3_1686916498071_0.md b/pages/hls__section_2.3_1686916498071_0.md
index e850557..81e3094 100644
--- a/pages/hls__section_2.3_1686916498071_0.md
+++ b/pages/hls__section_2.3_1686916498071_0.md
@@ -124,4 +124,11 @@ file-path:: ../assets/section_2.3_1686916498071_0.pdf
   hl-color:: yellow
   id:: 648c5cf5-239a-4d47-a57a-d65c53c215c4
   hl-type:: area
-  hl-stamp:: 1686920437098
\ No newline at end of file
+  hl-stamp:: 1686920437098
+- [:span]
+  ls-type:: annotation
+  hl-page:: 45
+  hl-color:: yellow
+  id:: 648c5de0-d650-443a-8a67-768066dce154
+  hl-type:: area
+  hl-stamp:: 1686920671997
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index edc49ee..a87e743 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2759,7 +2759,7 @@
 								- ((648c5c81-d93b-4859-9ee0-37cceb8fd100))
 							- **Usage** of Markov's inequality and Chebyshev's inequality
 								- ((648c5cf5-239a-4d47-a57a-d65c53c215c4))
-							-
+							- **Example**:
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01