diff --git a/assets/section_2.4_1686920705980_0.edn b/assets/section_2.4_1686920705980_0.edn
index 3a5f269..499177d 100644
--- a/assets/section_2.4_1686920705980_0.edn
+++ b/assets/section_2.4_1686920705980_0.edn
@@ -79,5 +79,17 @@
                           :rects (),
                           :page 9},
                :content {:text "[:span]", :image 1686921222888},
+               :properties {:color "yellow"}}
+              {:id #uuid "648c62d4-454b-43ab-88a8-d35a5a867523",
+               :page 13,
+               :position {:bounding {:x1 35,
+                                     :y1 85.75,
+                                     :x2 579,
+                                     :y2 406.75,
+                                     :width 604.7249999999999,
+                                     :height 453.54333333333324},
+                          :rects (),
+                          :page 13},
+               :content {:text "[:span]", :image 1686921939940},
                :properties {:color "yellow"}}],
- :extra {:page 13}}
+ :extra {:page 16}}
diff --git a/assets/section_2.4_1686920705980_0/13_648c62d4-454b-43ab-88a8-d35a5a867523_1686921939940.png b/assets/section_2.4_1686920705980_0/13_648c62d4-454b-43ab-88a8-d35a5a867523_1686921939940.png
new file mode 100644
index 0000000..3bcd97c
Binary files /dev/null and b/assets/section_2.4_1686920705980_0/13_648c62d4-454b-43ab-88a8-d35a5a867523_1686921939940.png differ
diff --git a/pages/hls__section_2.4_1686920705980_0.md b/pages/hls__section_2.4_1686920705980_0.md
index ad338de..ae62096 100644
--- a/pages/hls__section_2.4_1686920705980_0.md
+++ b/pages/hls__section_2.4_1686920705980_0.md
@@ -38,4 +38,11 @@ file-path:: ../assets/section_2.4_1686920705980_0.pdf
   hl-color:: yellow
   id:: 648c6007-c181-4e85-9a88-046841e6739d
   hl-type:: area
-  hl-stamp:: 1686921222888
\ No newline at end of file
+  hl-stamp:: 1686921222888
+- [:span]
+  ls-type:: annotation
+  hl-page:: 13
+  hl-color:: yellow
+  id:: 648c62d4-454b-43ab-88a8-d35a5a867523
+  hl-type:: area
+  hl-stamp:: 1686921939940
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 5b0ac99..e79e575 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2786,7 +2786,8 @@
 							  collapsed:: true
 								- mean, variance ((648c6007-c181-4e85-9a88-046841e6739d))
 							- Examples:
-								-
+								- ((648c62d4-454b-43ab-88a8-d35a5a867523))
+							-
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01