六级写作过关必备（33）

　　Write your letter in no less than 150 words. Do not sign your own name at the end of the letter; use Li Ming instead. You do not need to write the address.

　　June 23, 2007

　　Dear Sir/Madam,

　　Im writing to extend my heartfelt thanks to all the nurses and doctors in your hospital.

　　Last month, while I was on a business trip in Taiyuan, Shanxi province, I suffered from a bad cold and a fever, so I was sent to Ward Rom 201, Chaoyang Medical Center. During my stay at hospital, nurses on duty patiently took my temperature, regularly examined my body, and often fed meals to me. In addition, doctors prescribed me the most effective drugs and gave the best medical advice. Thanks to the constant care from the hospital staff, I recovered quickly. Now that I have returned home, the excellent service of your hospital still impresses me. I believe that as patient, I have received the most professional treatment and the most considerate care.

　　Please allow me to convey my sincere greetings toward the doctors and nurses that contribute all their efforts, patience and energy to their patients. Nothing can express my gratitude except my best wishes to them. If you have anything that needs my help, please dont hesitate to contact me.

　　Yours sincerely,

　　原因1.A number of factors are accountable for this situation.

　　A number of factors might contribute to the phenomenon .

　　2.The answer to this problem involves many factors.

　　3.The phenomenon mainly stems from the fact that...

　　4.The factors that contribute to this situation include...

　　5.The change in ...largely results from the fact that...

　　6.We may blame ...,but the real causes are...

　　7.Part of the explanations for it is that ...

　　One of the most common factors (causes .is that ...

　　Another contributing factor (cause .is ...

　　Perhaps the primary factor is that

　　But the fundamental cause is that