diff --git a/eBook/18.0.md b/eBook/18.0.md
index 63e6191..f7739e2 100644
--- a/eBook/18.0.md
+++ b/eBook/18.0.md
@@ -3,5 +3,5 @@
 ## 链接
 
 - [目录](directory.md)
-- 上一节：[运算符模板和接口](17.4.md)
+- 上一章：[运算符模板和接口](17.4.md)
 - 下一节：[字符串](18.1.md)
\ No newline at end of file
diff --git a/eBook/18.1.md b/eBook/18.1.md
index ec98db3..2d075ba 100644
--- a/eBook/18.1.md
+++ b/eBook/18.1.md
@@ -57,5 +57,5 @@ for ix, ch := range str {
 ## 链接
 
 - [目录](directory.md)
-- 上一章：[出于性能考虑的实用代码片段](18.0.md)
+- 上一节：[出于性能考虑的实用代码片段](18.0.md)
 - 下一节：[数组和切片](18.2.md)
\ No newline at end of file
diff --git a/eBook/18.10.md b/eBook/18.10.md
new file mode 100644
index 0000000..e69de29
diff --git a/eBook/18.11.md b/eBook/18.11.md
new file mode 100644
index 0000000..e69de29
diff --git a/eBook/18.2.md b/eBook/18.2.md
new file mode 100644
index 0000000..f7739e2
--- /dev/null
+++ b/eBook/18.2.md
@@ -0,0 +1,7 @@
+# 18 出于性能考虑的实用代码片段
+
+## 链接
+
+- [目录](directory.md)
+- 上一章：[运算符模板和接口](17.4.md)
+- 下一节：[字符串](18.1.md)
\ No newline at end of file
diff --git a/eBook/18.3.md b/eBook/18.3.md
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index 0000000..e69de29
diff --git a/eBook/18.4.md b/eBook/18.4.md
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index 0000000..e69de29
diff --git a/eBook/18.5.md b/eBook/18.5.md
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index 0000000..e69de29
diff --git a/eBook/18.6.md b/eBook/18.6.md
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diff --git a/eBook/18.7.md b/eBook/18.7.md
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diff --git a/eBook/18.8.md b/eBook/18.8.md
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diff --git a/eBook/18.9.md b/eBook/18.9.md
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index 0000000..e69de29