diff --git a/assets/section_2.3_1686916498071_0.edn b/assets/section_2.3_1686916498071_0.edn
index 7aacc62..a3e1e4c 100644
--- a/assets/section_2.3_1686916498071_0.edn
+++ b/assets/section_2.3_1686916498071_0.edn
@@ -229,5 +229,17 @@
                           :rects (),
                           :page 43},
                :content {:text "[:span]", :image 1686920320810},
+               :properties {:color "yellow"}}
+              {:id #uuid "648c5cf5-239a-4d47-a57a-d65c53c215c4",
+               :page 44,
+               :position {:bounding {:x1 49,
+                                     :y1 147.58203125,
+                                     :x2 684,
+                                     :y2 428.58203125,
+                                     :width 725.67,
+                                     :height 544.252},
+                          :rects (),
+                          :page 44},
+               :content {:text "[:span]", :image 1686920437098},
                :properties {:color "yellow"}}],
- :extra {:page 45}}
+ :extra {:page 44}}
diff --git a/assets/section_2.3_1686916498071_0/44_648c5cf5-239a-4d47-a57a-d65c53c215c4_1686920437098.png b/assets/section_2.3_1686916498071_0/44_648c5cf5-239a-4d47-a57a-d65c53c215c4_1686920437098.png
new file mode 100644
index 0000000..0133f9f
Binary files /dev/null and b/assets/section_2.3_1686916498071_0/44_648c5cf5-239a-4d47-a57a-d65c53c215c4_1686920437098.png differ
diff --git a/pages/hls__section_2.3_1686916498071_0.md b/pages/hls__section_2.3_1686916498071_0.md
index 97b71d5..e850557 100644
--- a/pages/hls__section_2.3_1686916498071_0.md
+++ b/pages/hls__section_2.3_1686916498071_0.md
@@ -117,4 +117,11 @@ file-path:: ../assets/section_2.3_1686916498071_0.pdf
   hl-color:: yellow
   id:: 648c5c81-d93b-4859-9ee0-37cceb8fd100
   hl-type:: area
-  hl-stamp:: 1686920320810
\ No newline at end of file
+  hl-stamp:: 1686920320810
+- [:span]
+  ls-type:: annotation
+  hl-page:: 44
+  hl-color:: yellow
+  id:: 648c5cf5-239a-4d47-a57a-d65c53c215c4
+  hl-type:: area
+  hl-stamp:: 1686920437098
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 2ce8bfe..89f0cc8 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2757,7 +2757,8 @@
 								- ((648c5c6f-d6b4-4c65-b9a4-9f51f93f86ad))
 							- Chebyshev's inequality #flashcard
 								- ((648c5c81-d93b-4859-9ee0-37cceb8fd100))
-						-
+							- Example:
+								-
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01