帮忙翻译一下这篇医学英文!急用!Varicose veins and telangiectasias (spider veins) are nearly universal. Natural history may range from the asymptomatic unsightly appearance, to achiness and heaviness after prolonged standing, to swelling

帮忙翻译一下这篇医学英文!急用!Varicose veins and telangiectasias (spider veins) are nearly universal. Natural history may range from the asymptomatic unsightly appearance, to achiness and heaviness after prolonged standing, to swelling
帮忙翻译一下这篇医学英文!急用!
Varicose veins and telangiectasias (spider veins) are nearly universal. Natural history may range from the asymptomatic unsightly appearance, to achiness and heaviness after prolonged standing, to swelling and itching in the limb. Superficial thrombophlebitis may occur, but is rarely complicated by deep venous thrombosis or pulmonary embolism. Large varicosities can cause overlying ulceration of the skin and (rarely) bleeding, especially in elderly or debilitated people.
Postphlebitic syndrome is present in all individuals who have had DVT. For the first years or two following a DVT event, it consists of mild chronic leg discomfort and mild edema. Five years after the DVT, however ,50% of patients have developed significant leg edema, induration ,and stasis dermatitis at the ankle. Another 5-20% of individuals develop venous ulceration. By 10 years, more than 90% have lower extremity symptoms. The natural history of post-thrombotic syndrome can be altered by compression therapy with heavy support hose (40 mm Hg). Thrombolytic therapy (catheter-directed thrombolysis) for acute, symptomatic DVTs in the proximal circulation of the extremity may favorably alter the natural history of postphlebitic syndrome by more quickly reducing clot burden, preventing venous obstruction, and reducing valvular damage.

帮忙翻译一下这篇医学英文!急用!Varicose veins and telangiectasias (spider veins) are nearly universal. Natural history may range from the asymptomatic unsightly appearance, to achiness and heaviness after prolonged standing, to swelling
静脉曲张和毛细血管扩张（蜘蛛静脉）几乎是普遍的.自然史的范围可以从无症状难看的外观,以及沉重的achiness长时间站立后,关节肿胀,四肢发痒的.浅表血栓可能发生,但很少深静脉血栓形成或肺栓塞复杂.静脉曲张可能会导致大覆盖的皮肤和（很少）出血,尤其是老年人或体弱的人,溃疡.
Postphlebitic综合征是存在于所有谁有深静脉血栓形成的个人.首年或2后深静脉血栓事件,这是轻微的慢性腿部不适和轻微水肿组成.五年之后,深静脉血栓形成,但是,50％的患者已发展了显着下肢水肿,硬结,血瘀性皮炎和踝关节处.另一个5-20％的个人发展静脉溃疡.10年,超过90％的下肢症状.在自然历史后血栓综合症可以改变压缩治疗重型支持软管（40毫米汞柱）.溶栓治疗（导管直接溶栓治疗）,急性,在四肢近端流通症状DVTs可媲美更迅速地改变了血凝块的负担减轻了postphlebitic综合征的自然史,防止静脉阻塞,降低心脏瓣膜损害.