全文获取类型
收费全文 | 11021篇 |
免费 | 565篇 |
国内免费 | 77篇 |
专业分类
耳鼻咽喉 | 128篇 |
儿科学 | 139篇 |
妇产科学 | 85篇 |
基础医学 | 1449篇 |
口腔科学 | 257篇 |
临床医学 | 638篇 |
内科学 | 2804篇 |
皮肤病学 | 277篇 |
神经病学 | 1014篇 |
特种医学 | 489篇 |
外科学 | 2007篇 |
综合类 | 58篇 |
一般理论 | 1篇 |
预防医学 | 274篇 |
眼科学 | 143篇 |
药学 | 586篇 |
中国医学 | 23篇 |
肿瘤学 | 1291篇 |
出版年
2023年 | 93篇 |
2022年 | 165篇 |
2021年 | 328篇 |
2020年 | 148篇 |
2019年 | 236篇 |
2018年 | 276篇 |
2017年 | 224篇 |
2016年 | 295篇 |
2015年 | 298篇 |
2014年 | 355篇 |
2013年 | 397篇 |
2012年 | 650篇 |
2011年 | 732篇 |
2010年 | 422篇 |
2009年 | 394篇 |
2008年 | 584篇 |
2007年 | 677篇 |
2006年 | 666篇 |
2005年 | 659篇 |
2004年 | 616篇 |
2003年 | 583篇 |
2002年 | 590篇 |
2001年 | 205篇 |
2000年 | 193篇 |
1999年 | 204篇 |
1998年 | 142篇 |
1997年 | 146篇 |
1996年 | 95篇 |
1995年 | 114篇 |
1994年 | 57篇 |
1993年 | 76篇 |
1992年 | 100篇 |
1991年 | 90篇 |
1990年 | 101篇 |
1989年 | 85篇 |
1988年 | 81篇 |
1987年 | 89篇 |
1986年 | 68篇 |
1985年 | 64篇 |
1984年 | 24篇 |
1983年 | 31篇 |
1982年 | 26篇 |
1981年 | 22篇 |
1980年 | 22篇 |
1979年 | 43篇 |
1978年 | 26篇 |
1975年 | 20篇 |
1974年 | 18篇 |
1973年 | 18篇 |
1972年 | 17篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
Watanabe H Saitoh M Orikasa S Matsushima M Yoshida H Tanahashi Y Matsuo M Watanabe M Chiba Y Sawamura TY Saito T Nonomura M 《Urologic oncology》1995,1(5):215-222
We performed a clinical phase III study with a galactosebased ecoo contrast agent, SH/TA-508, to evaluate its efficacy, safety, and usefulness for mass lesions in urology. SH/TA-508 was prepared as a suspension containing stabilized micro-air bubbles by adding water for injection just before use. SH/TA-508 was administered into the antecubital vein at an initial dose of 300 mg/ml × 5 ml followed by higher doses of 400 mg/ml × 4 ml, 300 mg/ ml × 10 ml or 400 mg/ml × 8 ml when a sufficient effect was not obtained. Efficacy was evaluated by color Doppler signal enhancement, the duration of blood flow signal enhancement, and improvement of diagnostic capacity. Fifty-nine patients with mass lesions in the kidney, prostate, testis, adrenal gland, and bladder were enrolled in the study. Up to the third dose the cumulative efficacy rates (≥2+) of color Doppler signal enhancement and duration of blood flow signal enhancement were 92% and 87%, respectively. Consequently, diagnostic capacity in 76% of the patients was remarkably improved. A light transient angialgia occurred in one patient but no other clinically significant changes were observed. It was confirmed that SH/TA-508 is a safe echo contrast agent that offers satisfactory color Doppler signal enhancement in the urologic organs mentioned above. 相似文献
103.
Shiomi H Hase T Matsuno S Izumi M Tatsuta T Ito F Kishida A Tani T Kodama M 《Surgery today》1999,29(12):1280-1284
An 18-year-old male was admitted to our Emergency Department with a traumatic abdominal wall hernia (TAWH) of the left lower
quadrant (LLQ) after suffering hypogastric blunt injury and urogenital lacerations in a motorcycle accident. Upright chest
X-ray showed a small amount of right infradiaphragmatic free air, and a computed tomographic (CT) scan demonstrated an abdominal
wall hernia. At surgery, no impairment was found in the digestive tract, and an abdominal herniorrhaphy was performed. It
is suggested that the free air had passed through a connection between the scrotal laceration and the contralateral abdominal
defect via the subcutaneous space and was palpated as emphysema. This is a new type of TAWH, which suggests that blunt abdominal
trauma may result in negative pressure in the subcutaneous and peritoneal cavity, and this could reflect the pathophysiology
of TAWH. 相似文献
104.
To examine the neurophysiological and cognitive characteristics of language disorder in schizophrenia, the N400 component and late positive component (LPC) of event-related potentials (ERPs) were investigated in medicated schizophrenic patients and health comparison subjects. The subjects were required to indicate whether Japanese sentence completions were semantically congruous or incongruous. The ERPs for the range of 300-500 ms to the incongruous completions contained a more negative component (N400), followed by LPC, which was inversely more positive for the incongruous than congruous condition. The N400 effect and the mean amplitude of the LPC were reduced in the patients. The attenuated N400 effect in schizophrenics mainly originated from an enhanced negativity for the congruous completions, suggesting that the use of context is poor in schizophrenia. 相似文献
105.
Sakakibara H Zhu SK Furuta M Kondo T Miyao M Yamada S Hideaki T 《Environmental health and preventive medicine》1996,1(3):114-118
Factors associated with knee pain were investigated using 871 self-administered questionnaires (405 men and 466 women) from
residents aged over 30 years in a rural area of Japan. The prevalence of knee pain increased with age, particularly in women
over 50. It was significantly higher in women than in men. Body mass index (BMI) was significantly related to knee pain in
women, though not in men. With reference to occupational factors, frequent heavy lifting on the job was significantly associated
with knee pain in both men and women, whereas job-related standing and walking showed no such relationship. As for living
conditions, residence on rather steep mountain slopes and the habit of sitting on Japanese tatami mats were significant factors
related to knee pain in men, but not in women. There was no association of knee pain with the style of toilet (Japanese or
Western). After controlling for all significant factors by multiple logistic regression analysis, age, heavy lifting, and
residence on steep slopes were found to be independent factors related to knee pain in men; and age, BMI, and heavy lifting
were the factors in women. 相似文献
106.
T. Morioka T. Matsushima K. Ikezaki S. Nagata M. Ohta K. Hasuo M. Fukui 《Neuroradiology》1993,35(6):462-465
Two cases of intracranial adenoid cystic carcinoma mimicking meningioma are reported. In one, MRI showed not only a homogeneously enhancing extra-axial tumour attached to the dura mater of the posterior cranial fossa, but also surrounding dural enhancement, the dural tail sign. In the second, CT demonstrated a well-demarcated enhancing extra-axial tumour, indistinguishable from a sphenoid ridge meningioma extending into the orbit. The neuroradiological features of intracranial adenoid cystic carcinoma may thus closely resemble those of meningioma. 相似文献
107.
Masashi Takamatsu Mitsuru Ohata Kazuhiko Sakamoto Yasuyuki Searashi Kunihiko Takeda Hideaki Suzuki Hisato Nakajima Masayoshi Yamauchi Ken Hokkyo Gotaro Toda Noritoshi Shinkai 《Nihon Arukōru Yakubutsu Igakkai zasshi》2003,38(6):492-497
A case of female alcoholic who developed liver cirrhosis with small amounts of alcohol by the common use of contraceptive agent was reported. A case was a 33-year-old female who had complained of systemic edema and jaundice. She had been drinking alcohol, while she had been taking the contraceptive agent from 20-year-old. On admission, she had a large amount of ascites with jaundice. She was diagnosed as liver cirrhosis and hepatic failure by CT scanning of abdomen and laboratory data. Her condition was temporarily improved by the abstinence and the treatment. Since she drank under hospitalization, she had to change the hospital and died after 2 months. She had been drinking for only 10 years. Her cumulative alcohol intake was also very small. She may have developed alcoholic cirrhosis with small amount of alcohol because of common use of contraceptive agent with drinking. 相似文献
108.
109.
Keiichi Ichimura Masashi Sugasawa Ken-ichi Nibu Esao Takasago Kenji Hasezawa 《Auris, nasus, larynx》1997,24(4):391-397
We sometimes experience patients with persistent or progressive arytenoid edema, among which residual or recurrent cancer is often accompanied. Because it is difficult to distinguish tumour rest or recurrence from normal tissue sequelae in the early period after irradiation, it is important to know both the contributing factors for arytenoid edema, and the incidence of residual or recurrent tumours in patients with postirradiation laryngeal edema. We therefore reviewed the charts of 67 patients with early laryngeal carcinoma who had received a curative dose of irradiation in the last 5 years. Fourteen patients (20.9%) had moderate or severe laryngeal edema persisting for or developing at more than 3 months after completion of a course of definitive radiotherapy. The incidence was highest in supraglottic T2 disease, followed by glottic T2 tumour. Of the 14 patients with edema, six (42.9%) had persistent or recurrent disease. The primary disease was uncontrolled in 18 patients, 17 of whom received successful salvage surgery. In patients without residual tumours, the edema was usually moderate and resolved within a year, although four patients had chronic edema lasting more than a year after treatment. All four had supraglottic T2 lesions and received 70 Gy of X-ray. We also reviewed, for sake of comparison, the records of 38 patients treated with radiotherapy at doses of more than 40 Gy between l975 and 1980, when endoscopic microsurgery for laryngeal cancer was introduced as a primary part of treatment. The incidence of persistent or late developed edema over the period, though not significant, was 36.8%: nearly twice that of the last 5 years. Microscopic endolaryngeal surgical procedures seem to have been a causal factor for edema in this period. 相似文献
110.
Fujio Kakuya Masashi Takase Noriyuki Ishii Mayumi Kajino Tokitsugi Hayashi Kazutoshi Miyamoto Senichi Muraki Jun Iwamoto Akimasa Okuno 《Pediatrics international》1998,40(2):155-158
Abstract The delivery of nitric oxide (NO) via a nasopharyngeal tube is an alternative to endotracheal intubation. A male infant with end-stage pulmonary hypertension (PH) due to a severe hypoplastic lung developed a PH crisis on day 145 and received NO inhalation via a nasopharyngeal tube. Clinical improvement was maintained for 7 days with18–22ppm NO inhalation. The patient remained in close physical contact with his parents without the use of sedation. Blood methemoglobin levels remained below 1%. The environmental NO levels were less than 0.06 ppm and NO2 less than 0.3 ppm throughout the treatment, well within the safety margin. On day 152, the patient succumbed to hypoxemia and heart failure. The use of a nasopharyngeal NO delivery system without sedation, as an alternative to endotracheal intubation with sedation, was a practical method in treating a patient with PH while maintaining a certain quality of life for the patient and the family. 相似文献