全文获取类型
收费全文 | 19347篇 |
免费 | 1709篇 |
国内免费 | 120篇 |
专业分类
耳鼻咽喉 | 269篇 |
儿科学 | 685篇 |
妇产科学 | 413篇 |
基础医学 | 2379篇 |
口腔科学 | 508篇 |
临床医学 | 1639篇 |
内科学 | 4150篇 |
皮肤病学 | 681篇 |
神经病学 | 1155篇 |
特种医学 | 993篇 |
外国民族医学 | 6篇 |
外科学 | 3130篇 |
综合类 | 367篇 |
一般理论 | 3篇 |
预防医学 | 1453篇 |
眼科学 | 465篇 |
药学 | 1443篇 |
2篇 | |
中国医学 | 127篇 |
肿瘤学 | 1308篇 |
出版年
2023年 | 154篇 |
2022年 | 502篇 |
2021年 | 730篇 |
2020年 | 487篇 |
2019年 | 743篇 |
2018年 | 934篇 |
2017年 | 653篇 |
2016年 | 681篇 |
2015年 | 613篇 |
2014年 | 891篇 |
2013年 | 1186篇 |
2012年 | 1358篇 |
2011年 | 1491篇 |
2010年 | 1006篇 |
2009年 | 926篇 |
2008年 | 1008篇 |
2007年 | 990篇 |
2006年 | 947篇 |
2005年 | 778篇 |
2004年 | 708篇 |
2003年 | 514篇 |
2002年 | 497篇 |
2001年 | 352篇 |
2000年 | 355篇 |
1999年 | 265篇 |
1998年 | 190篇 |
1997年 | 162篇 |
1996年 | 145篇 |
1995年 | 124篇 |
1994年 | 86篇 |
1993年 | 96篇 |
1992年 | 59篇 |
1991年 | 64篇 |
1990年 | 47篇 |
1989年 | 60篇 |
1988年 | 79篇 |
1987年 | 68篇 |
1986年 | 51篇 |
1985年 | 67篇 |
1984年 | 108篇 |
1983年 | 94篇 |
1982年 | 66篇 |
1981年 | 43篇 |
1980年 | 58篇 |
1979年 | 59篇 |
1978年 | 60篇 |
1977年 | 52篇 |
1976年 | 51篇 |
1975年 | 44篇 |
1955年 | 45篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
A N Nasi A M Mangoud M I Assaf M I Abou Zeid M M Azab 《The Journal of the Egyptian Public Health Association》1992,67(5-6):685-695
Serum samples were collected from 40 patients with enlarged lymph nodes. Lymph node and bone marrow biopsies were performed and processed as usual. Tumor necrosis factor-alpha (TNF alpha) was determined in the sera by factor test human TNF alpha ELISA kit. Histopathological studies of lymph node and bone marrow biopsies were evaluated. The data obtained from this study showed that bone marrow was involved in only 5 patients and their TNF showed the lowest level in this study with a mean level 50 pg/ml. The highest level of TNF occurred in cases with granulomatous lymphadenitis (124 pg/ml) followed by reactive lymphadenitis (105 pg/ml). It can be considered that TNF reflects the immune status of the patient and its study in the serum can be of help in evaluating the progress of the disease. An extended study is need to evaluate the role of TNF-alpha as a prognostic marker in malignancy. 相似文献
42.
Sandra Lobo Jaroslav Cervenka Arnold London Mary Ella M. Pierpont 《American journal of medical genetics. Part A》1992,43(4):701-703
We report on a patient with interstitial deletion of 10q and compare her to 8 previously described patients, 2 of whom have chromosomal breakpoints similar to our patient. Minor anomalies including broad forehead, hypertelorism, strabismus, prominent philtrum, and “dysplastic” pinnae are present in our patient. Psychomotor retardation and hypotonia are universal findings in 10q interstitial deletion. Growth retardation, not present in our patient, is seen in some. These clinical findings are sufficiently distinct to suggest early chromosome studies. © 1992 Wiley-Liss, Inc. 相似文献
43.
44.
M El Kababri M El Khorassani L Hessissen A Kili M N Nachef M Khattab F Msefer Alaoui 《Archives de pédiatrie》2004,11(1):29-32
Venous thrombosis is rare in children. It can be either acquired or of constitutional origin. Thrombosis during non-Hodgkin lymphoma remains exceptional and is usually locally associated to the tumoral process, raising the issue of its tumoral or cruoric nature. The treatment is based on anticoagulation concomitantly to chemotherapy. We report on a 4-year-old boy admitted for mediastinal non-Hodgkin lymphoma, who developed a thrombosis of the superior vena cava associated to protein S-deficiency. The mechanism of thrombosis may have been multifactorial: associated protein S-deficiency, vascular compression, tumoral process and chemotherapy. 相似文献
45.
Abdul Rahman D El Kinge Rami A Mahfouz Ali I Shamseddine Ali T Taher 《Blood coagulation & fibrinolysis》2007,18(6):577-579
Recombinant activated factor VII has been Food and Drug Administration approved to treat hemorrhages in hemophiliac patients with inhibitors and in acquired hemophilia patients. Recombinant activated factor VII use has also been considered for the management of uncontrolled bleeding in a number of congenital and acquired hemostatic abnormalities. The myeloproliferative disorders are a group of clonal hematologic diseases where, frequently, abnormal platelet function is considered a hallmark. This is the first case report addressing the clinical benefit of off-label use of recombinant activated factor VII in an attempt to control intractable bleeding in a patient with a myeloproliferative disorder after splenectomy. 相似文献
46.
47.
48.
49.
A. Bezza R. Niamane B. Amine A. El Maghraoui R. Bensabbah N. Hajjaj-Hassouni 《Revue du Rhumatisme》2004,71(12):1155-1158
Objective. – To describe the clinical and radiological features of foot involvement in patients with psoriatic arthritis.Methods. – We retrospectively reviewed the medical records of patients admitted between 1972 and 1999 for psoriatic arthritis with involvement of the foot. We included all patients who had peripheral and/or axial, asymmetric, chronic inflammatory joint disease meeting or not Avila's radiological criteria for psoriatic arthritis, with or without other imaging findings suggestive of psoriatic arthritis and with or without psoriasis.Results. – Twenty-six patients were included. Inflammatory heel pain was reported by 14 patients, whereas forefoot involvement was found in only seven patients. Sausage toe was present in two patients. None of the patients had Bauer's toe (combining arthritis and psoriatic skin and/or nail changes) or psoriatic onychopachydermoperiostitis of the great toe. Radiological abnormalities were found in 20 patients. Half the patients had calcaneal changes. Osteoperiostitis of the great toe was noted in two patients and mushrooming in five.Discussion. – The features of psoriatic arthritis in Morocco seem similar to those in other countries. Hindfoot involvement was present in 53% of patients. Involvement of the forefoot was rarely recorded in the charts, suggesting missed cases because of insufficient attention to the forefoot during the physical examination and availability of anteroposterior radiographs only. Oblique views (Hirtz and Chaumet) should be obtained because they give a clearer image of the distal part of the toes, which is often difficult to analyze on anteroposterior films. 相似文献
50.