如何完美表達書信中的「謝謝」

Thank you for one of the most memorable days of my trip.
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為了旅途中最值得留念的一天，謹向您表示感謝。
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Thank you for one of the most enjoyable visits we have had in many months.
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6 Y1 g" b+ w* j; g$ i在您處的參觀訪問，是我們幾個月中最愉快的一次。謹向您表示感謝。

/ l0 l; X6 `/ u/ V( MThank you for one of the most memorable days of my trip.

為了旅途中最值得留念的一天，謹向您表示感謝。
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Thank you for doing so much to make my trip to New York interesting (pleasant)(resultful).
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為了使我去紐約的旅遊有趣（愉快）（大有收穫），您做了許多事，特此致謝。

2 E& N. t$ _$ ^: E: V  X* bThank you for contributing so much to the pleasure of our stay in ...

感謝您為使我們在......的停留期間的愉快所作的許多努力。
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. R" r. f9 f% w" _6 T- d: aThank you so much for your generous hospitality.

/ H" x) d- x. I/ Q非常感謝您慷慨的款待。

) {, J+ e& g) y" vI hope something will bring you to New York soon so that I can reciprocate your kindness.

( X/ Y. R. D3 ^7 Y9 D希望不久您能有機會到紐約來，使我能答謝您的盛情。
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You must give me the chance to return your kindness when you visit here.

希望您光臨我處，使我能答謝您的盛情。
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Thank you very much (ever so much) (most sincerely) (indeed) (from the bottom of my heart).
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1 L8 m! W# c( s6 {1 V/ x  d很（非常）（最真誠地）（確實）（衷心）感謝您。
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: A1 y" A/ T% N: x8 @- B9 @- `Many thanks for your kind and warm letter.

1 b& ?3 S9 l  E( s感謝您友好而熱情的來信。
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$ F8 D) x1 F4 J5 z1 \Thanks a million (ever so much).

萬分（非常）感謝。

/ T% d6 N5 }3 A2 g5 Q# zPlease accept ( I wish to express )my sincere (grateful) (profound) appreciation for ...
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請接受（致以）真摯的（衷心的）（深切的）感謝......
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I sincerely (deeply) (warmly) appreciate ...
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- p! S+ l5 |' u) h5 X, q我真摯的（深深的）（熱情的）感謝......

I am very sincerely (most) (truly) grateful to you for ...

/ C0 p: t0 f6 o) ]4 ]4 P7 T為了......，我非常真摯的（深深的）（真誠的）感謝您。 (待續)
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There is nothing more important (satisfying) (gratifying) to me than to receive one of your letters.

( `$ L9 \- R/ ~# c再也沒有比收到您的來信更使我覺得重要（快慰）（感激）了。

Your letters are so much fun (comfort) (entertainment) (company).
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您的來信充滿了樂趣（給了很大安慰）（帶來了歡樂）（使我不感寂寞）。

Your most courteous (considerate)(delightful)letter...

您那彬彬有禮（體貼入微）（令人欣慰）的來信……

- B) j5 A1 {- uI cannot tell you how much your letter delighted(relieved)(amused)(enchanted)me.

* _3 o  R, o; U4 c我無法告訴您，您的來信使我多麼高興（寬慰）（覺得有趣）（陶醉）。

8 \: c( Y, w; E3 \; WI love the way you say (put) things in your letters. You make even the smallest incident seem so interesting(important)

(charming)(mysterious).

. ^% s6 s' [2 x我很欣賞您在信中描述各種事物的手法。您的妙筆使細小的事情都顯得很有趣（重要）（動人）（神秘）。
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# S* f8 }" w, y* f- RIt was good (fine)(charming)(thoughtful)of you...
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承蒙好意（美意）（盛情）（關心）……

It was nice(characteristically thoughtful) (more than kind) of you...

% f1 b. m! Q7 ~# j" N承蒙好意（特別關心）（十二分好意）……

At the outset, I want to thank you for your kindness to me and for your compliments.
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1 h9 s- y& S, K4 S' d% J7 P首先，我要感謝您對我的友愛和問候。
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Believe me, I am truly grateful for...
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/ F" u- N$ Z, u! X+ B我確實真誠地感謝你……
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We were deeply touched by ...
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; U$ |' G' G1 T/ q……使我們深受感動。

7 k. ?& n+ e+ ]/ d, v* u+ eIt is a hopeless(definite)(positive)understatement to say that I am deeply (sincerely)(truly)grateful.
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: m* U4 c0 q6 [! p這就是說「我深深的（真摯的）（真誠的）感謝」遠不足以（不能確切）（不能明確）表達我的謝意。
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It』s generous of you to take so much interest in my work( to give me so much of your time) (to show me so much consideration).

5 V- c+ n# C# w7 J4 k/ G) h承蒙對我的工作如此操心（為我花費這麼多時間）（對我如此關懷）。

We are indebted to you...

我們感謝你……

I regret very much that I did not have an opportunity to thank you personally for ...

未能面謝，深表遺憾。