diff --git a/assets/section_2.4_1686920705980_0.edn b/assets/section_2.4_1686920705980_0.edn
index 499177d..8f404f4 100644
--- a/assets/section_2.4_1686920705980_0.edn
+++ b/assets/section_2.4_1686920705980_0.edn
@@ -91,5 +91,17 @@
                           :rects (),
                           :page 13},
                :content {:text "[:span]", :image 1686921939940},
+               :properties {:color "yellow"}}
+              {:id #uuid "648c63b8-21ff-42d4-ad87-70c706124ba1",
+               :page 17,
+               :position {:bounding {:x1 38,
+                                     :y1 64.666015625,
+                                     :x2 686,
+                                     :y2 223.666015625,
+                                     :width 725.67,
+                                     :height 544.252},
+                          :rects (),
+                          :page 17},
+               :content {:text "[:span]", :image 1686922168232},
                :properties {:color "yellow"}}],
- :extra {:page 16}}
+ :extra {:page 18}}
diff --git a/assets/section_2.4_1686920705980_0/17_648c63b8-21ff-42d4-ad87-70c706124ba1_1686922168232.png b/assets/section_2.4_1686920705980_0/17_648c63b8-21ff-42d4-ad87-70c706124ba1_1686922168232.png
new file mode 100644
index 0000000..273672a
Binary files /dev/null and b/assets/section_2.4_1686920705980_0/17_648c63b8-21ff-42d4-ad87-70c706124ba1_1686922168232.png differ
diff --git a/pages/hls__section_2.4_1686920705980_0.md b/pages/hls__section_2.4_1686920705980_0.md
index ae62096..765b1e9 100644
--- a/pages/hls__section_2.4_1686920705980_0.md
+++ b/pages/hls__section_2.4_1686920705980_0.md
@@ -45,4 +45,11 @@ file-path:: ../assets/section_2.4_1686920705980_0.pdf
   hl-color:: yellow
   id:: 648c62d4-454b-43ab-88a8-d35a5a867523
   hl-type:: area
-  hl-stamp:: 1686921939940
\ No newline at end of file
+  hl-stamp:: 1686921939940
+- [:span]
+  ls-type:: annotation
+  hl-page:: 17
+  hl-color:: yellow
+  id:: 648c63b8-21ff-42d4-ad87-70c706124ba1
+  hl-type:: area
+  hl-stamp:: 1686922168232
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index e79e575..cf26589 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2787,7 +2787,8 @@
 								- mean, variance ((648c6007-c181-4e85-9a88-046841e6739d))
 							- Examples:
 								- ((648c62d4-454b-43ab-88a8-d35a5a867523))
-							-
+								- ((648c63b8-21ff-42d4-ad87-70c706124ba1))
+						-
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01