diff --git a/gradle.properties b/gradle.properties
index ecb6ab9..f3bdb84 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,7 +5,7 @@ MORNY_ARCHIVE_NAME = morny-coeur
 MORNY_CODE_STORE = https://github.com/Eyre-S/Coeur-Morny-Cono
 MORNY_COMMIT_PATH = https://github.com/Eyre-S/Coeur-Morny-Cono/commit/%s
 
-VERSION = 1.0.0-RC3.2
+VERSION = 1.0.0-RC3.3
 
 USE_DELTA = false
 VERSION_DELTA =
diff --git a/src/main/java/cc/sukazyo/cono/morny/bot/event/OnQuestionMarkReply.java b/src/main/java/cc/sukazyo/cono/morny/bot/event/OnQuestionMarkReply.java
index 00f1a90..8e51eeb 100644
--- a/src/main/java/cc/sukazyo/cono/morny/bot/event/OnQuestionMarkReply.java
+++ b/src/main/java/cc/sukazyo/cono/morny/bot/event/OnQuestionMarkReply.java
@@ -12,21 +12,26 @@ import static cc.sukazyo.cono.morny.util.CommonRandom.probabilityTrue;
 
 public class OnQuestionMarkReply extends EventListener {
 	
-	public static final Set<String> QUESTION_MARKS = Set.of("?", "？", "¿", "⁈", "⁇", "‽", "❔", "❓");
+	/**
+	 * 一个 unicode 的问号字符列表. 不仅有半角全角问号，也包含了变体问号，和叹号结合的问好以及 uni-emoji 问号。
+	 * @since 1.0.0-RC3.2
+	 */
+	public static final Set<Character> QUESTION_MARKS = Set.of('?', '？', '¿', '⁈', '⁇', '‽', '❔', '❓');
 	
 	@Override
 	public boolean onMessage (@Nonnull Update update) {
 		
 		if (update.message().text() == null) return false;
 		
-		if (QUESTION_MARKS.contains(update.message().text()) && probabilityTrue(8)) {
-			MornyCoeur.extra().exec(new SendMessage(
-					update.message().chat().id(), update.message().text()
-			).replyToMessageId(update.message().messageId()));
-			return true;
+		if (!probabilityTrue(8)) return false;
+		for (char c : update.message().text().toCharArray()) {
+			if (!QUESTION_MARKS.contains(c)) return false;
 		}
 		
-		return false;
+		MornyCoeur.extra().exec(new SendMessage(
+				update.message().chat().id(), update.message().text()
+		).replyToMessageId(update.message().messageId()));
+		return true;
 		
 	}
 	
diff --git a/src/main/java/cc/sukazyo/cono/morny/util/CommonRandom.java b/src/main/java/cc/sukazyo/cono/morny/util/CommonRandom.java
index 4e90fff..22c9812 100644
--- a/src/main/java/cc/sukazyo/cono/morny/util/CommonRandom.java
+++ b/src/main/java/cc/sukazyo/cono/morny/util/CommonRandom.java
@@ -5,16 +5,38 @@ import java.util.concurrent.ThreadLocalRandom;
 
 public class CommonRandom {
 	
+	/**
+	 * 通过 {@link ThreadLocalRandom} 以指定的一定几率返回 true.
+	 * @param probability 一个正整数，决定在样本空间中有多大的可能性为 true。
+	 * @param base 一个正整数，决定样本空间有多大。
+	 * @return 有 {@code base} 分之 {@code probability} 的几率，返回值为 {@link true}.
+	 *         如果 {@code probability} 大于 {@code base}，也就是为 true 的可能性大于 100%，则会永远为 true。
+	 * @throws IllegalArgumentException
+	 *         当参数 base 或是 probability 不为正整数时
+	 * @since 1.0.0-RC3.2
+	 */
 	public static boolean probabilityTrue (@Nonnegative int probability, @Nonnegative int base) {
 		if (probability < 1) throw new IllegalArgumentException("the probability must be a positive value!");
 		if (base < 1) throw new IllegalArgumentException("the probability base must be a positive value!");
 		return probability > ThreadLocalRandom.current().nextInt(base);
 	}
 	
+	/**
+	 * 以一定几率返回 true.
+	 * @return {@code probabilityIn} 分之 {@link 1} 的几率为 {@link true}.
+	 * @see #probabilityTrue(int, int)
+	 * @since 1.0.0-RC3.2
+	 */
 	public static boolean probabilityTrue (@Nonnegative int probabilityIn) {
 		return (probabilityTrue(1, probabilityIn));
 	}
 	
+	/**
+	 * 通过 {@link ThreadLocalRandom} 实现的随机 boolean 取值.
+	 * @return 随机的 {@link true} 或 {@link false}，各占(近似)一半可能性.
+	 * @see ThreadLocalRandom#nextBoolean()
+	 * @since 1.0.0-RC3.2
+	 */
 	public static boolean iif () {
 		return ThreadLocalRandom.current().nextBoolean();
 	}