diff --git a/.gitignore b/.gitignore
index 8a92505..feb61c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,11 @@
 *.tocheb
 .cache/
 result
+
+# AUCTeX (Emacs LaTeX preview)
+auto/
+_region_.tex
+_region_.prv/
+
+# Auto-downloaded LaTeX package files
+*.sty
diff --git a/content/method/method.tex b/content/method/method.tex
index 0ea17ba..e35ff64 100644
--- a/content/method/method.tex
+++ b/content/method/method.tex
@@ -248,4 +248,5 @@ $\mathcal{D} = \{(\mathbf{x}_i, y_i)\}_{i=1}^{n}$
 %%% Local Variables:
 %%% mode: latex
 %%% TeX-master: "../../main"
+%%% TeX-engine: xetex
 %%% End: