README.md in rails_cache_it-0.0.1 vs README.md in rails_cache_it-0.0.2

@@ -1,8 +1,8 @@
 # RailsCacheIt
 
-Help you cache with ActiveRecord.
+Help you easy to cache with ActiveRecord.
 
 Only support Rails program.
 
 ## Installation
 
@@ -26,10 +26,14 @@
 
 Only work on Relation now(it means you can't use it with #first #last etc..).
 
 ###expires
 
+`User.limit(50).cache_it expires_in: 5.minutes`
+
+or use block
+
 `User.limit(50).cache_it{ User.count}`
 
 when block.call != pre_block.call
 cache will expires
 
@@ -37,10 +41,10 @@
 
 view [AvtiveSupport::Cache::Store#fetch](http://api.rubyonrails.org/classes/ActiveSupport/Cache/Store.html#method-i-fetch)
 
 ###set default options
 
-`RailsCacheIt.default_options.merge(options)`
+`RailsCacheIt.default_options.merge!(options)`
 
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)