首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   71549篇
  免费   4008篇
  国内免费   229篇
耳鼻咽喉   936篇
儿科学   4400篇
妇产科学   1335篇
基础医学   8793篇
口腔科学   1827篇
临床医学   5072篇
内科学   13794篇
皮肤病学   1921篇
神经病学   4053篇
特种医学   1947篇
外国民族医学   1篇
外科学   10360篇
综合类   2474篇
一般理论   33篇
预防医学   3846篇
眼科学   2830篇
药学   6984篇
中国医学   559篇
肿瘤学   4621篇
  2023年   447篇
  2022年   1222篇
  2021年   2597篇
  2020年   1432篇
  2019年   1706篇
  2018年   2275篇
  2017年   1619篇
  2016年   2101篇
  2015年   2162篇
  2014年   3109篇
  2013年   3745篇
  2012年   5198篇
  2011年   5170篇
  2010年   3017篇
  2009年   2530篇
  2008年   3637篇
  2007年   3641篇
  2006年   3498篇
  2005年   2918篇
  2004年   2831篇
  2003年   2422篇
  2002年   2050篇
  2001年   1555篇
  2000年   1522篇
  1999年   1271篇
  1998年   560篇
  1997年   417篇
  1996年   426篇
  1995年   395篇
  1994年   317篇
  1993年   272篇
  1992年   826篇
  1991年   721篇
  1990年   776篇
  1989年   701篇
  1988年   618篇
  1987年   584篇
  1986年   569篇
  1985年   538篇
  1984年   425篇
  1983年   337篇
  1982年   204篇
  1979年   335篇
  1978年   216篇
  1977年   258篇
  1975年   226篇
  1974年   236篇
  1973年   242篇
  1972年   219篇
  1971年   217篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.

Background

Multiple myeloma (MM) is a hematologic malignancy of plasma cell origin. MM primarily affects bone marrow, but extramedullary sites can also be involved. Myelomatous pleural effusion (MPE) is an atypical and rare complication of MM. We aimed to systematically study the incidence and clinicopathologic profile of patients with MPE in a real-world setting.

Patients and Methods

In this retrospective study, 415 consecutive patients with MM managed at a tertiary care center in North India during a study period of January 1, 2010 to December 31, 2015 were evaluated for MPE. The patients with MPE were analyzed for their clinical profile, diagnosis, treatment, and outcomes.

Results

Of these 415 patients, 11 (2.65%) patients had MPE. The median age of the study population was 50 years with male preponderance. The majority of these patients had immunoglobin (Ig)G Kappa disease. All patients had higher than International Staging System stage I disease. MPE was a presenting feature at MM diagnosis in 45.45% (n = 5) of the patients, whereas the rest developed MPE during follow-up. MPE presented predominantly (81.8%) as a unilateral effusion. Concurrent extramedullary involvement at other site was seen in 45.45% (n = 5), with 3 (27%) patients having concurrent myelomatous ascites. Six of these were managed aggressively, whereas 5 patients opted for palliation. The outcomes were dismal (90.9% mortality), with a median survival of 2.47 months.

Conclusion

MPE is a rare entity, and positive outcomes of therapy remain low with dismal prognosis.  相似文献   
23.
The rise in popularity of hyaluronic acid (HA) dermal filler injection has caused an exceptional increase in the number of cases of reported irreversible blindness. Here, we reported a case of ischemic optic neuropathy and ophthalmoplegia following subcutaneous HA filler injection with complete visual recovery. A 31-year-old Chinese woman presented with sudden onset of right monocular visual impairment associated with diplopia. Patient had received a hyaluronic acid-containing ?ller injection for nasal dorsum augmentation twelve hours prior to presentation. Visual acuity of the right eye was counting finger. A right relative afferent pupillary defect was demonstrated with ophthalmoplegia. Humphrey visual field test disclosed a right inferior altitudinal field defect with impairment of colour vision. Computed tomography of the orbit revealed mild enlargement of the right medial and inferior recti muscles. Our patient showed a tremendous improvement of vision after a subcutaneous hyaluronidase injection with complete visual recovery within 2 weeks.  相似文献   
24.
25.
26.
27.
Mirror movements are simultaneous, involuntary, identical movements occurring during contralateral voluntary movements. These movements are considered as soft neurologic signs seen uncommonly in clinical practice. The mirror movements are described in various neurological disorders which include parkinsonism, cranio veretebral junction anamolies, and hemiplegic cerebral palsy. These movements are intriguing and can pose significant disability. However, no such observation regarding mirror movements in progressive hemifacial atrophy have been reported previously. We are reporting a teenage girl suffering from progressive hemifacial atrophy and epilepsy with demonstrable mirror movements in hand.  相似文献   
28.
29.
30.
BACKGROUND: Penetrating injuries of the perineum are rare but very dangerous. Since the genitourinary and colorectal organs may be injured, how to evaluate surgical management of the injury is very important.METHODS: The present report presents a case of penetrating injury of the perineum by a wooden stick when the patient fell on the upright wooden stick from a tree. The three feet long stick entered the perineal region just left lateral to the anal opening. Upon reaching the thoracic cavity, it broke and only a foot stick was left in the subcutaneous plane. These injuries are potentially serious with risk of damage to multiple organs. Exploratory laprotomy was done, and bladder injury was repaired. The entry wound and the track of stick was thoroughly washed and allowed for secondary intention healing.RESULTS: The post operative period was uneventful and the patient recovered fully.CONCLUSION: Meticulous evaluation and surgical management of perineal injuries are the key to prevent devastating complications.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号