diff --git a/jieba/posseg/__init__.py b/jieba/posseg/__init__.py
index 982c132..09df9e4 100644
--- a/jieba/posseg/__init__.py
+++ b/jieba/posseg/__init__.py
@@ -66,7 +66,7 @@ def __cut(sentence):
 
 def __cut_detail(sentence):
 	re_han, re_skip = re.compile(ur"([\u4E00-\u9FA5]+)"), re.compile(ur"([\.0-9]+|[a-zA-Z0-9]+)")
-	re_eng,re_num = re.compile(ur"[a-zA-Z+#]+"), re.compile(ur"[0-9]+")
+	re_eng,re_num = re.compile(ur"[a-zA-Z0-9]+"), re.compile(ur"[\.0-9]+")
 	blocks = re_han.split(sentence)
 	for blk in blocks:
 		if re_han.match(blk):
@@ -125,8 +125,8 @@ def cut(sentence):
 			sentence = sentence.decode('utf-8')
 		except:
 			sentence = sentence.decode('gbk','ignore')
-	re_han, re_skip = re.compile(ur"([\u4E00-\u9FA5a-zA-Z0-9+#&]+)"), re.compile(ur"(\s+)")
-	re_eng,re_num = re.compile(ur"[a-zA-Z+#]+"), re.compile(ur"[0-9]+")
+	re_han, re_skip = re.compile(ur"([\u4E00-\u9FA5a-zA-Z0-9+#&\.]+)"), re.compile(ur"(\s+)")
+	re_eng,re_num = re.compile(ur"[a-zA-Z0-9]+"), re.compile(ur"[\.0-9]+")
 	blocks = re_han.split(sentence)
 	for blk in blocks:
 		if re_han.match(blk):
diff --git a/test/test_pos.py b/test/test_pos.py
index ce11410..5e2862f 100644
--- a/test/test_pos.py
+++ b/test/test_pos.py
@@ -91,4 +91,6 @@ if __name__ == "__main__":
 	cuttest('两块五一套，三块八一斤，四块七一本，五块六一条')
 	cuttest('小和尚留了一个像大和尚一样的和尚头')
 	cuttest('我是中华人民共和国公民;我爸爸是共和党党员; 地铁和平门站')
-	cuttest('张晓梅去人民医院做了个B超然后去买了件T恤')
\ No newline at end of file
+	cuttest('张晓梅去人民医院做了个B超然后去买了件T恤')
+	cuttest('AT&T是一件不错的公司，给你发offer了吗？')
+	cuttest('C++和c#是什么关系？11+122=133，是吗？PI=3.14159')
\ No newline at end of file